The Quickest Way To Get Certified (BSCI ) TestKing's Building Scalable Cisco Internetworks. Version 20.

Transcription

1 The Quickest Way To Get Certified (BSCI ) TestKing's Building Scalable Cisco Internetworks Version

2 Please Read Carefully This Study Guide has been carefully written and compiled by Real-Exams experts. It is designed to help you learn the concepts behind the questions rather than be a strict memorization tool. Repeated readings will increase your comprehension. We continually add to and update our Study Guides with new questions, so check that you have the latest version of this Guide right before you take your exam. For security purposes, each PDF file is encrypted with a unique serial number associated with your Real-Exams account information. In accordance with International Copyright Law, Real-Exams reserves the right to take legal action against you should we find copies of this PDF file has been distributed to other parties. Please tell us what you think of this Study Guide. We appreciate both positive and critical comments as your feedback helps us improve future versions. We thank you for buying our Study Guides and look forward to supplying you with all your Certification training needs. Good studying! Real-Exams Technical and Support Team

3 Note: Section A contains 209 questions Section B contains 200 questions. The total number of questions is 409. Each section starts with QUESTION NO :1. There are no missing questions Section A QUESTION NO: 1 Of the following AS numbers, which are private AS numbers? (Choose all that apply.) A B C D Answer: D This autonomous system designator is a 16-bit number, with a range of 1 to RFC 1930 provides guidelines for the use of AS numbers. A range of AS number, through 65535, is reserved for private use, much like the private Internet Protocol (IP) addresses. Reference: Building Scalable Cisco Networks (Ciscopress) page 312 QUESTION NO: 2 You are the network administrator at TestKing. You want to prevent routing loops caused by running different routing protocols and redundant paths between two autonomous systems. Which of the following IOS features can you use to achieve this? (Choose all that apply.) A. Two-way redistribution. B. Static redistribution. C. Passive interfaces. D. Route filtering. Answer: C, D - 3 -

4 Topic: Avoiding Routing Loops When Redistributing Proof: Routing loops occur when a routing protocol is fed its own networks. The routing protocol might see a network as having a more favorable path, although this path points in the opposite direction, into a different routing protocol domain. The potential for confusion is enormous, and it is very easy to create routing loops when redistributing. The problem is solved by the following configurations: Changing the metric, Changing the administrative distance, Using default routes, Using passive interfaces with static routes, Using distribute lists Source: CCNP Self-Study CCNP BSCI Exam Certification Guide Third Edition P QUESTION NO: 3 Which of the following commands display OSPF parameters, such as filters, default metric, maximum paths, and number of areas configured on a router? A. show ip protocol B. show ip ospf interface C. show ip route D. show ip ospf Answer: A The show ip protocols command, displays parameters about timers, filters, metrics, network, and other information for the entire router. Reference: Building Scalable Cisco Networks (Ciscopress) page 133 QUESTION NO: 4 You are the network administrator at TestKing. You perform the following configuration on a 256 kbps HDLC interface: interface serial 0/0 bandwidth 56 ip bandwidth-percent eigrp How much bandwidth is allocated for EIGRP traffic? A. 56 kbps B. 112 kbps - 4 -

5 C. 128 kbps D. 140 kbps E. 256 kbps Answer: D The bandwidth-percent command tells EIGRP what percentage of the configured bandwidth it may use. The default is 50% but can have values greater than 100. The syntax for the bandwidth-percent command is: ip bandwidth-percent eigrp <AS_number> <value> Reference: QUESTION NO: 5 By default, Cisco routers perform route summarization for which of the following routing protocols? (Choose all that apply.) A. STP B. IGRP C. OSPF D. RIPv.2 E. EIGRP Answer: B, D, E Sending route summaries Routing information advertised out an interface is automatically summarized at major (classful) network address boundaries by RIP, IGRP, and EIGRP. Specifically, this autonomous summarization occurs for those routes whose classful network address differs from the major network address of the interface to which the advertisement is being sent. Reference: Building Scalable Cisco Networks (Ciscopress) page 79 QUESTION NO: 6 You are the network administrator at TestKing. The following problem is reported: the /24 prefix was not injected into the local BGP table on RouterA. RouterA s configuration and routing table information is show in the following exhibit: - 5 -

6 configuration: router bgp 321 network neighbor remote-as 322 no auto-summary routing table information: show ip route include /24 [110/11] via , 2d00h, Ethernet0/0 Why is it that this particular prefix is not in the local BGP table? A. This route is not a BGP learned route. B. The neighbor is down. C. Auto-summary is disabled. D. The prefix /24 is not a connected route. Answer: A The show ip route command will not display the BGP table. You must use the show ip bgp command to display the entries in the BGP routing table. Reference: Building Scalable Cisco Networks (Ciscopress) page 348 QUESTION NO: 7 You are the network administrator at TestKing. You want to display RIP routing transactions. Which command should you issue in EXEC mode? A. show ip route B. show ip rip route C. show ip rip D. debug ip rip E. debug ip route Answer: D You can use the debug ip rip EXEC command to display information on RIP routing transactions. The no form of this command disables debugging output

7 Reference: 7ff66.html QUESTION NO: 8 Study the Exhibit below carefully: Assuming the router-id command is not used, what is the OSPF router ID for TestKing2? A B C D

8 Answer: D The highest ip address on an active interface is normally used as the OSPF router ID. This can be overridden by configuring an IP address on a loopback address on a loopback interface. Reference: Building Scalable Cisco Networks (Ciscopress) page 126 QUESTION NO: 9 In which of the following OPF networks does Designated Router (DR) election take place? (Choose all that apply.) A. Point-to-multipoint B. Broadcast multi-access C. Point-to-point D. Nonbroadcast multi-access Answer: B, D Mode NBMA Broadcast Adjency Manual Configuration DR/BDR elected Automatic DR/BDR elected Reference: Building Scalable Cisco Networks (Ciscopress) page 124 QUESTION NO: 10 Which of the following are the general IPv6 address types? (Choose all that apply.) A. Broadcast B. Multicast C. Public D. Private E. Unicast F. Anycast - 8 -

9 Answer: B, E, F IPv6 Address Type: Unicast - An IPv6 unicast address is an identifier for a single interface, on a single node. A packet that is sent to a unicast address is delivered to the interface identified by that address. IPv6 Address Type: Anycast - An anycast address is an address that is assigned to a set of interfaces that typically belong to different nodes. A packet sent to an anycast address is delivered to the closest interface as defined by the routing protocols in use identified by the anycast address. IPv6 Address Type: Multicast - An IPv6 multicast address is an IPv6 address that has a prefix of FF00::/8 ( ). An IPv6 multicast address is an identifier for a set of interfaces that typically belong to different nodes. Reference: html#99899 QUESTION NO: 11 You are the network administrator at TestKing. You want to minimize the effect of routing table updates on internal routers when a WAN interface changes its state from up to down on a frequent basis. What strategy should you implement? A. Use private IP addresses. B. Use dial-on-demand routing. C. Use a routing protocol that tolerates route flapping. D. Use route summarization. E. Use a distance vector routing protocol. Answer: D Another advantage to using route summarization in a large complex network is that it can isolate topology changes from other routers. That is, if a specific link in the domain were flapping (going down and up rapidly), the summary route would not change, so no router external to the domain would need to keep modifying its routing table due to this flapping activity. Reference: Building Scalable Cisco Networks (Ciscopress) page

10 QUESTION NO: 12 What happens when a BGP route reflector receives update from a peer in another autonomous system? A. It sends the update only to routers in that autonomous system. B. It sends the update to all routers in the network. C. It ignores update from nonclients peers. D. It sends the update to all BGP peers. E. It discards the update. Answer: D When a BGP route reflector receives update from a peer in another autonomous system, it sends the update to all BGP peers in the network. Reference: BSCI Self Study Cisco Press (2003) 2nd Edition, page 490. QUESTION NO: 13 Study the Exhibit below carefully:

11 On the S0 interface of router TestKing1, what is the default OSPF network type? A. Nonbroadcast B. Point-to-point C. Broadcast D. Point-to-multipoint E. Point-to-multipoint nonbroadcast Answer: E There are three different scenarios for NBMA interfaces. Pure Multipoint Configuration (No Subinterfaces) Pure Point-to-Point Configuration (each VC on a separate subinterface) Hybrid Configuration (point-to-point and multipoint subinterfaces) Reference:

12 QUESTION NO: 14 Match the OSPF area type in the options by dragging-and-dropping it to the description in the target area. Answer: Stub Areas: These areas do not accept routes belonging to external autonomous systems (AS); however, these areas have inter-area and intra-area routes. In order to reach the outside networks, the routers in the stub area use a default route which is injected into the area by the Area Border Router (ABR). Normal Areas: These areas can either be standard areas or transit (backbone) areas. Standard areas are defined as areas that can accept intra-area, inter-area and external routes

13 backbone area is the central area to which all other areas in OSPF connect. Totally Stub Areas: These areas do not allow routes other than intra-area and the default routes to be propagated within the area. The ABR injects a default route into the area and all the routers belonging to this area use the default route to send any traffic outside the area. NSSA: This type of area allows the flexibility of importing a few external routes into the area while still trying to retain the stub characteristic. Assume that one of the routers in the stub area is connected to an external AS running a different routing protocol, it now becomes the ASBR, and hence the area can no more be called a stub area. However, if the area is configured as a NSSA, then the ASBR generates a NSSA external link-state advertisement (LSA) (Type-7) which can be flooded throughout the NSSA area. These Type-7 LSAs are converted into Type-5 LSAs at the NSSA ABR and flooded throughout the OSPF domain Reference: QUESTION NO: 15 What is the IP address which is known as the all OSPF DRs and BDRs address? A B C D Answer: B is the address of all OSPF DRs and BDRs. Reference: Building Scalable Cisco Networks (Ciscopress) page 114 QUESTION NO: 16 Study the exhibit of a BGP configuration below carefully. Which BGP network statement will inject the /16 prefix in the BGP table? interface ethernet 0 ip address

14 ! int serial 0 ip address ! router bgp neighbor remote-as A. network mask B. network mask C. network mask D. network E. network mask Answer: B Explanation QUESTION NO: 17 Of the following which are the characteristics of an Autonomous System (AS) in a BGP network? (Choose all that apply.) A. Within an AS, routers learned through an interior protocol cannot be redistributed using BGP to other autonomous systems. B. An AS is a group of routers under the same technical administration. C. An AS uses exterior gateway protocols (EGPs) to exchange information with other autonomous systems. D. Within an AS, routes learned through BGP can be redistributed using interior gateway protocols. E. Within an AS, all routers must run either BGP or IBGP. Answer: B C D Exterior Gateway Protocol (EGP) routing protocol used to connect between autonomous systems. The use of the term autonomous system in connection with BGP stresses the fact that the administration of an autonomous system appears to other autonomous systems to have a single coherent interior routing plan, and presents a consistent picture of those networks that are reachable through it. BGP is used between autonomous systems Reference: Building Scalable Cisco Networks (Ciscopress) page

15 QUESTION NO: 18 Where can route summarization be done, when one uses VLSM in an EIGRP network? A. Manually on any router interface. B. Dynamically at the supernet boundary. C. Only at classful network boundaries. D. Only at classless network boundaries. Answer: A EIGRP allows you to summarize internal and external routes on virtually any bit boundary using manual summarization Source: CCNP Self-Study CCNP BSCI Exam Certification Guide Third Edition P.482 Topic: Summarization with EIGRP Proof: Summarization in EIGRP solves the same scaling issues seen in other networks. The difference in the configuration between EIGRP and OSPF is that OSPF is summarized only at the area boundary. Because EIGRP does not use the concept of areas, summarization can be configured on any router interface in the network. Consideration of where to summarize is determined by the hierarchical structure of the network. If summarization is not configured, EIGRP will automatically summarize at the class boundry. QUESTION NO: 19 You are a technician at TestKing. Your newly appointed TestKing trainee wants to know under which circumstances you would use static routing in stead of a dynamic routing protocol. What would your reply be? (Choose all that apply.) A. High degree of control in path selection is required. B. Low maintenance routing is required. C. Networks with a single entry point. D. Highly adaptable networks. E. A medium to large network with redundant paths. Answer: A, C

16 Define specific routs to use when two autonomous systems must exchange routing information, rather than having entire routing tables exchanged. Define routes to destinations over a WAN link to eliminate the need for a dynamic routing protocol- that is, when you do not want routing updates to enable or cross the link. C: Networks with a single entry point have no real benefit, and would be a waste of router resources. A default route is usually used in this case. Reference: Building Scalable Cisco Networks (Ciscopress) page 463 Not E: Medium to large networks benefit from dynamic routing. QUESTION NO: 20 You are the network administrator at TestKing. One of the TestKing trainees wants to know how to perform route redistribution when exchanging routes between two protocols. What would your reply be? (Choose all that apply.) A. Use static routes when there is only one path. B. Use one way route distribution when there are multiple paths. C. Use static routes when there are multiple paths. D. Use two way route redistribution where there are multiple paths. E. Use one way route redistribution when there is only one path. F. Use two way route distribution when there is only one path. Answer: B C B. One way redistribution- To avoid routing loops and problems with varying convergence time, allow routes to be exchanged in only one direction, not both directions. In the other direction, you should consider a default route. C. When you want to prevent routing loops Many companies have large enough networks that redundant paths are prominent. In some cases, for example, when a path to the same destination is learned from two different routing protocols, you may want to filter the propagation of one of the paths. Reference: Building Scalable Cisco Networks (Ciscopress) page 472 QUESTION NO: 21 Where in a network does IS-IS use level-1 routing?

17 A. Between areas. B. Between domains. C. Between intermediate systems in the same area. D. Between end systems and intermediate systems in the same area. Answer: C A two-level hierarchy is used to support large routing domains. A large domain may be administratively divided into areas. Each system resides in exactly one area. 1 Routing within an area is referred to as Level 1 routing. Routing between areas is referred to as Level 2 routing. A Level 2 Intermediate System (IS) keeps track of the paths to destination areas. A Level 1 IS keeps track of the routing within its own area. For a packet destined for another area, a Level 1 IS sends the packet to the nearest Level 2 IS in its own area, regardless of what the destination area is. Then the packet travels via Level 2 routing to the destination area, where it may travel via Level 1 routing to the destination. It should be noted that selecting an exit from an area based on Level 1 routing to the closest Level 2 IS might result in suboptimal routing. 2 Reference: QUESTION NO: 22 The following is an OSI IS-IS NSAP address: C C D12.00 What is the Area ID in this specific address? A. 46 B. 00 C C D C.0061 E. 040C D12 Answer: D An NSAP address (figure 7) has two major parts: the initial domain part (IDP) and the domain specific part (DSP) (Figure 7). The IDP consists of a 1-byte authority and format identifier (AFI) and a variable-length initial domain identifier (IDI), and the DSP is a string of digits identifying a particular transport implementation of a

18 specified AFI authority. Everything to the left of the system ID can be thought of as the area address of a network node. Figure 7 The NSAP address Reference: QUESTION NO: 23 You are the network administrator at TestKing. You issue the following configuration commands on a router named TestKing2. TestKing2(config)#router rip TestKing2(config-router)#version 2 TestKing2(config-router)#no auto-summary What would be the effect of these configuration commands? A. Subnet mask information is not passed in the routing updates. B. Subnets are advertised across network boundaries. C. Subnets are summarized at the network boundary. D. Subnets are made discontiguous. Answer: B To restore the default behavior of automatic summarization of subnet routes into network-level routes, use the auto-summary router configuration command. To disable this feature and transmit subprefix routing information across classful network boundaries, use the no form of this command. Reference: d9c56.html

19 QUESTION NO: 24 What is the function of the network command when you configure BGP? A. Routes matching the network command will be filtered from BGP routing updates. B. Local routes matching the network command can be installed into the BGP routing table. C. Local routes matching the network command are filtered from the BGP routing table. D. External routes matching the network command will be installed into the BGP routing table. Answer: B Use the network router configuration command to permit BGP to advertise a network if it is present in the IP routing table. Reference: Building Scalable Cisco Networks (Ciscopress) page 342 QUESTION NO: 25 TestKing.com is changing Internet service providers. As a result, they will need to install a local server. TestKing does not want to change the IP Addresses on all of its internal routers and servers. The ISP, Acme Inc. will allocate a registered class C address for TestKing to use. The current internal IP Address scheme will remain the same. Configure the router to provide network address translation (NAT) so that all internal PCs will use the single external IP Address assigned to the router interface. Configure a static translation so that the server will be accessible from the Internet. Due to TestKIng.com changing Internet Service Providers, they must install a local server. Privileged mode password: testking IP Addresses are shown below: Name: TestKingNAT SO /24 E /24 Server's External Address /24 Server's Internal Address

20 /24 To configure the router click on a host icon that is connected to a router by a serial console cable. Answer: TestKingNAT#Conf t TestKingNAT(config)#Access-list 5 permit TestKingNAT(config)#Ip nat pool lan netmask TestKingNAT(config)#Ip nat inside source list 5 pool lan overload TestKingNAT(config)#Ip nat inside source static TestKingNAT(config-if)#Int S0 TestKingNAT(config-if)#Ip nat outside TestKingNAT(config-if)#Int E0 TestKingNAT(config-if)#Ip nat inside TestKingNAT(config-if)#exit TestKingNAT(config)#exit TestKingNAT#copy run start

21 QUESTION NO: 26 What is the method called that hides the internal IP address details and particulars from the outside world? A. Challenge Handshake Protocol B. Supernetting C. Subnetting D. Usernames and passwords Answer: B In large internetworks, hundreds or even thousands of networks can exist. In these environments, it is often not Desirable for routers to maintain all these routes in their routing table Route summarization (also called route aggregation or supernetting) can reduce the number of routes that a router must maintain because is it a method of representing a series of network numbers in a single summary address. Reference: Building Scalable Cisco Networks (Ciscopress) page 250 QUESTION NO: 27 What type of information can be found in an OSPF type 3 network summary link LSA? A. Summary of link state in an OSPF area. B. Summary of metric coast from ABR to ASBR. C. Summary of IP subnets in an OSPF area. D. Summary of routes in the AS. Answer: C Inter-area-prefix LSAs for ABRs (Type 3) Advertises internal networks to routers in other areas (interarea routes). Type 3 LSAs may represent a single network or a set of networks summarized into one advertisement. Only ABRs generate summary LSAs. In OSPF for IPv6, addresses for these LSAs are expressed as prefix, prefix length instead of address, mask. The default route is expressed as a prefix with length 0. Reference: html

22 QUESTION NO: 28 You are the network administrator at TestKing. The TestKing network has different routing policy requirements than what its Internet Service Provider provides. Which routing protocol will you recommend for the TestKing network? A. IS-IS B. EIGRP C. OSPF D. BGP4 E. RIPv2 Answer: D There are specific situations where using BGP is important, including the following: The routing policy of the ISP and your company differ. The cost of the link depends on usage in addition to other factors that might need to be programmed into the BGP configuration to make the best use of the connection by manipulating the traffic. Reference: Source: CCNP Self-Study CCNP BSCI Exam Certification Guide Third Edition P.517, Topic: When to Use BGP QUESTION NO: 29 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit:

23 You want to configure TESTKING1 and TESTKING2 to correctly exchange routing information via BGP. Which command sets will you use? (Choose all that apply.) A. TESTKING2(config)#router bgp 200 TESTKING2(config-router)#neighbor remote-as 100 B. TESTKING1(config)#router bgp 100 TESTKING1(config-router)#exit TESTKING1(config)#interface S0 TESTKING1(config-if)#neighbor remote-as 200 C. TESTKING1(config)#router bgp 100 TESTKING1(config-router)#neighbor remote-as 200 D. TESTKING2(config)#router bgp 100 TESTKING2(config-router)exit TESTKING2(config)#interface S0 TESTKING2(config-if)#neighbor remote-as 100 E. TESTKING1(config)#router bgp 100 TESTKING1(config-router)#network

24 TESTKING1(config-router)#neighbor remote-as 100 F. TESTKING2(config)#router bgp 200 TESTKING2(config-router)#network TESTKING2(config-router)#network remote-as 200 Answer: A, C Explanation QUESTION NO: 30 Of the following, which EIGRP table is comparable to a Link State Adjacency table? A. Neighbor table B. Topology table C. Routing table D. Successor table Answer: A Neighbor table Each EIGRP router maintains a neighbor table that lists adjacent routers. This table is comparable to the neighborship (adjacency) database used by OSPF. Reference: Building Scalable Cisco Networks (Ciscopress) page 250 QUESTION NO: 31 You are the network administrator at TestKing. Your assistant issued the following command on a TestKing router. TESTKING(config)#ip route s0/0 What conclusions can you draw from thia command? (Choose all that apply.) A. This is a route to interface s0/0 on the next hop router. B. Packets destined for this network are sent via interface s0/0 on TESTKING. C. Packets destined for this network enter router TESTKING through interface s0/0. D. There is only one path to this network from TESTKING

25 E. This is a route to a public network. Answer: B, D Ip route prefix mask {address Interface} [distance] [tag tag] [permanent] Prefix mask address Address The IP address of the next hop router that can be used to reach that network. Interface The network interface to use to get to the destination network. Reference: Building Scalable Cisco Networks (Ciscopress) page 464 QUESTION NO: 32 Which of the following features are associated with the distribution layer of the three-layer hierarchical network design model? (Choose all that apply.) A. Optimized transport structure B. Route redistribution C. Unauthorized entry access control lists D. Address aggregation E. Reliable transport structure Answer: B, D Explanation QUESTION NO:

26 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit: You want to apply a route map named ISPA to interface E0. Which set of commands will you use? A. TESTKING1(config)#interface e0 TESTKING1(config-if)#policy route-map ISPA B. TESTKING1(config)#interface e0 TESTKING1(config-if)#ip policy route-map ISPA C. TESTKING1(Config)#interface e0 TESTKING1(Config-if)#policy route map ISPA D. TESTKING1(config)#interface e0 TESTKING1(config-if)ip route-map ISPA Answer: B

27 Identifies the route map to use for PBR. One interface can only have one route-map tag, but you can have multiple route map entries with different sequence numbers. These entries are evaluated in sequence number order until the first match. If there is no match, packets will be routed as usual. Reference: 9d0dd.html QUESTION NO: 34 What conclusions can you draw from the binary address: ? A. It is a Class B public address. B. It is a Class C public address. C. It is a Class B private address D. It is a Class D experimental address. E. It is a Class C private address. Answer: B = = A public Class C address Reference: Building Scalable Cisco Networks (Ciscopress) page 66 QUESTION NO: 35 You are a technician at TestKing. Your newly appointed TestKing trainee wants to know which of the routing protocol multicast routing updates mentioned below uses Class D address What would your reply be? A. EIGRP B. IGRP C. OSPF D. RIPv2 Answer: D

28 Class D addresses are not as widely used. Class D addresses are multicast addresses; some Class D multicast addresses used by routing protocols are as follows: OSPF and Routing Information Protocol version 2 (RIPSv2) EIGRP Reference: Building Scalable Cisco Networks (Ciscopress) page 69 QUESTION NO: 36 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit:

29 Router TestKing5 makes use of a LSA type 7 to announce changes in the status of external network 22 to area 1. Which OSPF term will you use to describe area 1? A. Stub area B. Totally stubby area C. Normal area D. Transit area E. Not-so-stubby area Answer: E Stub Areas: These areas do not accept routes belonging to external autonomous systems (AS); however, these areas have inter-area and intra-area routes. In order to reach the outside networks, the routers in the stub area use a default route which is injected into the area by the Area Border Router (ABR). Normal Areas: These areas can either be standard areas or transit (backbone) areas. Standard areas are defined as areas that can accept intra-area, inter-area and external routes. backbone area is the central area to which all other areas in OSPF connect. Totally Stub Areas: These areas do not allow routes other than intra-area and the default routes to be propagated within the area. The ABR injects a default route into the area and all the routers belonging to this area use the default route to send any traffic outside the area. NSSA (Not-so-stubby area): This type of area allows the flexibility of importing a few external routes into the area while still trying to retain the stub characteristic. Assume that one of the routers in the stub area is connected to an external AS running a different routing protocol, it now becomes the ASBR, and hence the area can no more be called a stub area. However, if the area is configured as a NSSA, then the ASBR generates a NSSA external link-state advertisement (LSA) (Type-7) which can be flooded throughout the NSSA area. These Type-7 LSAs are converted into Type-5 LSAs at the NSSA ABR and flooded throughout the OSPF domain Reference: QUESTION NO: 37 How would you describe a domain in OSI terms? A. A set of non-routing network nodes only. B. Contiguous set of routers and hosts linked to the same data links. C. A contiguously connected area that can reach all other areas simultaneously. D. Any part of an OSI network that is under a common administrative authority

30 Answer: D An AS is a collection of networks under a common administration that share a common routing strategy. Autonomous systems are subdivided into areas, and an AS is sometimes called a domain. Reference: QUESTION NO: 38 Which of the following statements regarding the BGP synchronization command is true? (Choose all that apply.) A. Synchronization must be enabled when implementing a multi-homed BGP connection to multiple ISPs. B. Synchronization enhances BGP routing convergence. C. If turned ON, a prefix learned from IBGP neighbor is valid only in the presence of a non-bgp (IGP) route. D. Synchronization is necessary when engaging in a peer-to-peer relationship with an EBGP neighbor. E. Synchronization can be disabled if all the transit routers in an Autonomous system is running full mesh IBGP. Answer: A, E If your autonomous system (AS) will be passing traffic through it from another AS to a third AS, it is very important that your AS be consistent about the routes that it advertises. For example, if your BGP were to advertise a route before all routers in your network had learned about the route through your IGP, your AS could receive traffic that some routers cannot yet route. To prevent this from happening, BGP must wait until the IGP has propagated routing information across your autonomous system. This causes BGP to be synchronized with the IGP. Synchronization is enabled by default. Only if all routers in the transit path in the AS are running BGP it is safe to turn synchronization off. Reference: Building Scalable Cisco Networks (Ciscopress) page b5.html QUESTION NO:

31 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know which of the following NSAP addresses are a private, locally administered addresses. What would your reply be? (Choose all that apply.) A. 39.0f01.0d c B. 43.0f01.2c c00.1d11.00 C f1.4d c4d0.00 D ac dc.c7df.00 E. 52.0f01.3c c00.11c1.00 Answer: A, C The private NSAP addresses have AFI beginning with 39, 45 and 47. AESA Network Service Access Point (NSAP) ATM Addresses There are 3 types of private ATM addresses: NSAP encoding format for E.164 addresses - The authority and format identifier (AFI) is 45. These addresses are used in establishing ISDN calls by public networks, and they are normally used in public telephony. Data Country Code (DCC) AESA - The AFI is 39. These addresses are to be used in public networks. For example, the initial domain identifier (IDI) value 0x84.0f identifies the United States. International Code Designator (ICD) AESA - The AFI is 47. These addresses are used in private organizations, and the ICD field indicates the code set or organization. Cisco uses by default ICD addresses. Reference: QUESTION NO: 40 Which IS-IS metric type is the only type that Cisco IOS will support? A. Default B. Delay C. Bandwidth D. Expense E. Error Answer: A The original IS-IS specification defines four different types of metrics. Cost, being the default metric, is supported by all routers. Delay, expense, and error are optional metrics. The delay metric measures transit

32 delay, the expense metric measures the monetary cost of link utilization, and the error metric measures the residual error probability associated with a link. The Cisco implementation uses cost only. If the optional metrics were implemented, there would be a link-state database for each metric and SPF would be run for each link-state database. IS-IS uses a single required default metric with a maximum path value of The metric is arbitrary and typically is assigned by a network administrator. Any single link can have a maximum value of 64, and path links are calculated by summing link values. Maximum metric values were set at these levels to provide the granularity to support various link types while at the same time ensuring that the shortest-path algorithm used for route computation will be reasonably efficient. IS-IS also defines three optional metrics (costs): delay, expense, and error. Reference: QUESTION NO: 41 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know what the reason for SIA (Stuck in Active) route in EIGRP can be. What should you tell him? (Choose all that apply.) A. Some packets are lost between the routers. B. The neighboring router starts receiving route updates from the active router. C. The neighboring router stops receiving ACK packets from the active router. D. A failure causes traffic between two neighboring routers to become unidirectional. (unidirectional link). Answer: A, D The acknowledgement does not reach the destination or they are too delayed. Note: In some circumstances, it takes a very long time for a query to be answered. So long, in fact, that the router that issued the query gives up and clears its connection to the router that isn't answering, effectively restarting the neighbor session. This is known as a stuck in active (SIA) route. The most basic SIA routes occur when it simply takes too long for a query to reach the other end of the network and for a reply to travel back. Reference: Enhanced Interior Gateway Routing Protocol Incorrect Answers B: Does not apply to SIA. C: Ack packets don t reply to Query, only Reply do

33 QUESTION NO: 42 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know which of the routing protocols mentioned below operates by making routing decisions based on network policies or rules, using different path attributes. What would your reply be? A. IS-IS B. EIGRP C. RIPv1 D. BGP4 E. OSPF Answer: D Explanation QUESTION NO: 43 The following exhibit lists a number of network numbers: Network Number / / / / / / / / / /24 Which is the least amount of CIDR blocks required to summarize the subnetworks mentioned above? A. 1 B. 2 C

34 D. 4 E. 5 F. 6 G. 7 Answer: C Reference: It would take three CIDR blocks to summarize the Class C subnets in that table; / /21 ( ) /24 QUESTION NO: 44 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit: You want to configure a static route from the TestKing corporate network to Which of the following commands can be used? A. TESTKING1(config)#ip route B. TESTKING2(config)#ip route C. TESTKING2(config)#ip route D. TESTKING1(config)#ip route E. TESTKING2(config)#ip route Answer: E

35 Ip route prefix mask {address Interface} [distance] [tag tag] [permanent] Prefix mask address Address The IP address of the next hop router that can be used to reach that network. Reference: Building Scalable Cisco Networks (Ciscopress) page 464 QUESTION NO: 45 You are a technician at TestKing. Your newly appointed TestKing trainee wants to know which command she can use to configure IGRP to advertise a default route. What would your reply be? A. default-information originate B. ip default C. ip route D. ip default-network Answer: D The ip default-network command is used as a method of distributing route information to other routers. Reference: Building Scalable Cisco Networks (Ciscopress) page 467 QUESTION NO: 46 What could possibly happen when redistributing dynamically learned routes from an IGP into BGP? (Choose all that apply.) A. External IGP learned routes might have originated elsewhere. B. The BGP process will not recognise the IGP learned routes. C. Routing loops can occur. D. The routers are summarised automatically. Answer: A, C If redistribution is used, care must be taken that only local routes are redistributed. For example, routes learned from other autonomous systems (that were learned by redistributing BGP into the IGP) must not be sent out again from the IGP, or rooting loops could result

36 Reference: Building Scalable Cisco Networks (Ciscopress) page 408 QUESTION NO: 47 Your newly appointed TestKing trainee wants to know what would replace the router ID if you fail to put a loopback address in your OSPF configuration. What would your reply be? A. The priority number as set by the priority command. B. The reply number of the router as set by the priority command. C. The highest IP address configured in the router. D. It defaults to 255. E. The name set by the hostname command. Answer: C The show ip ospf interface command verifies that interfaces have been configured in the intended areas. If no loopback address is specified, the interface with the highest address is the taken router ID. It also gives the timer intervals, including the hello interval, and shows the neighbour adjacencies. Reference: Building Scalable Cisco Networks (Ciscopress) page 134 QUESTION NO: 48 You are the network administrator at TestKing. TestKing has been allocated the address space of /24 for WAN links. You divide the address space with a VLSM mask of 30 as follows: /30. How many subnets will be created for WAN links? A. 6 B. 24 C. 64 D. 128 E. 254 Answer: C

37 Reference: Building Scalable Cisco Networks (Ciscopress) page 73 Subnets are calculated 2^n where n = the number of bits. In this case we are using 6 bits, 2^6 = 64 QUESTION NO: 49 Match the EIGRP terms on the left with the correct description on the right by placing the EIGRP term in the target area. Answer: Answer: Neighbor table Topology Table Routing table Successor Feasible successor - lists adjacent routers - route entries for all destinations. - best routes to a destination - primary route used to reach a destination - backup route to the destination

38 Neighbor table Each EIGRP router maintains a neighbor table that lists adjacent routers. This table is comparable to the neighborship (adjacency) database used by OSPF. Topology Table An EIGRP router maintains a topology table for each network protocol configured: IP, IPX, and AppleTalk. All learned routes to a destination are maintained in the topology table. Routing table EIGRP choose the best routes to a destination from the topology table and places these routes in the routing table. The router maintains one routing table for each network protocol. Successor This is the primary route used to reach a destination. Successors are kept in the routing table. Feasible successor This is a neighbour that is downstream with respect to the destination, but it is not the least-cost path and thus is not used for forwarding data. In other words, this is a backup route to the destination. These routes are selected at the same time as successors, but are kept in the topology table. Reference: Building Scalable Cisco Networks (Ciscopress) page 250 QUESTION NO: 50 What makes OSPF the more popular choice for an open standard routing protocol when the one can choose between OSPF, RIPv1 and RIP v2? A. Simpler distance vector algorithm. B. Easy configuration C. Simpler route selection. D. Greater CPU overhead. E. Router memory requirements are greater. F. Greater scalability. Answer: C F Support for variable length subnet masks (VLSMs) Method for path selection Reference: Building Scalable Cisco Networks (Ciscopress) page QUESTION NO:

39 The TestKing network consists of a head office and 24 branch offices. Router TestKing1 is the headquarters router in a hub and spoke topology that supports 24 remote, branch offices. Between the head office and the remote offices Point-to-multipoint Frame Relay EIGRP network has been deployed. What would the bandwidth of each Frame Relay connection be as observed by the EIGRP process when there was no bandwidth command configured under either of the major serial interface or the subinterfaces on router TestKing1. A. 65 kbps B. 128 kbps C Mbps D Mbps Answer: A EIGRP by default assumes the bandwidth is a T1 (1.544 Mbps) if not specified (including subinterfaces). Because the question ask for "what is the bandwidth of each frame Relay connection..." the answer is Mbps/24 = 64.3 kbps. QUESTION NO: 52 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit:

40 Which of the following commands must be configured on Router TestKing1 interface serial 0 for OSPF to make this network operational? (Choose all that apply.) A. ip ospf network point-to-point B. ip ospf network point-to-multipoint C. frame-relay map ip D. frame-relay map ip E. frame-relay map ip broadcast F. frame-relay map ip broadcast Answer: B, E, F The ip ospf network command, typed under the interface configuration mode, is used to specify the OSPF network configuration and sets the network mode to point-to-multipoint Dlci- Data-link connection identifier (DLCI) number. Broadcast - Forwards broadcasts to the specified IP address

41 Reference: QUESTION NO: 53 Which of the following parameters will result from the show ip ospf interface command? (Choose all that apply.) A. Neighbor adjacencies B. Interface counts C. Router ID D. Summary link counts E. Link-state update interval Answer: A, C The show ip ospf interface command verifies that interfaces have been configured in the intended areas. If no loopback address is specified, the interface with the highest address is the taken router ID. It also gives the timer intervals, including the hello interval, and shows the neighbour adjacencies. Reference: Building Scalable Cisco Networks (Ciscopress) page 134 QUESTION NO: 54 EIGRP has both OSPF and IS-IS characteristics. Place the correct EIGRP characteristic in the proper protocol column

42 Answer: QUESTION NO: 55 Which of the following statements are valid when taking OSPF link state databases into consideration? (Choose all that apply.) A. Link state database information is used to build a routing table by determining a shortest-path tree. B. When there are no topology changes, link state databases are refreshed regularly. C. Each router has an identical link state database. D. Synchronization of link state databases is maintained by means of flooding of LSAs

43 E. External routes are imported into a separate link state database. Answer: A, C, D Reference: Building Scalable Cisco Networks (Ciscopress) page 178 QUESTION NO: 56 Your newly appointed TestKing trainee wants to know which routing protocol is defined by the OSI protocol suite at the network layer. What would your reply be? A. End System-to End System B. End System-to-Intermediate System C. Routing Information Protocol D. Intermediate System-to-Intermediate System E. Interior Gateway Routing Protocol Answer: D Intermediate System-to-Intermediate System (IS-IS) Protocol is an intradomain Open System Interconnection (OSI) dynamic routing protocol specified in International Organization for Standardization (ISO) The protocol is designed to operate in OSI Connectionless Network Service (CLNS). Data is carried using the protocol specified in ISO OSI CLNS is a network layer service similar to bare IP service. A CLNS entity communicates over Connectionless Network Protocol (CLNP) with its peer CLNS entity. Reference: QUESTION NO: 57 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit:

44 Which router will take on the role of level-2 DIS on this particular segment? A. TestKing1 B. TestKing2 C. TestKing3 D. TestKing4 Answer: B Reserved/circuit type Top 6 bits reserved; bottom 2 bits value = 0 indicates reserved; value = 1 indicates Level 1; value = 2 indicates Level 2; value = 3 indicates Level 1 and

45 Reference: QUESTION NO: 58 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know the advantages of classless routing protocols. What would your reply be? (Choose all that apply.) A. Summarization of discontinuous subnets. B. Automatic summarization beyond the network boundary. C. Support for VLSM. D. Improved convergence E. Support for FLSM. Answer: A, C A. Classless routing protocols support VLSM, and that, in turn, leads to more efficient allocation of subnet masks to meet different host requirements on different subnetworks, resulting in better utilization of host addresses. Because subnets routes are propagated throughout the routing domain, summarization is often required to keep the routing tables at a manageable size. Reference: Building Scalable Cisco Networks (Ciscopress) page QUESTION NO: 59 Consider the following partial configuration for Router A: interface serial0 ip address encapsulation frame-relay ip ospf network point-to-multipoint router ospf7 network area 0 Which of the following statements are true? (Choose all that apply.)

46 A. DB/BDR elections do not happen. B. The area 0 NBMA cloud is configured as multiple subnets. C. The router is limited to a hub and spoke topology. D. OSPF neighbor statements are obsolete. Answer: A, D In an OSPF Point-to-Multipoint environment, DB/BDR elections do not take place. The neighbor command became somewhat obsolete with the introduction of the capability to configure other network modes for the interface, regardless of the underlying physical topology. Reference: Building Scalable Cisco Networks (Ciscopress) page 130 and 181 QUESTION NO: 60 You are contracted as the network administrator at TestKing.com. Part of your job is to check the routing tables in the network. Which command would be the most appropriate to use to display the Level-2 routing table in Integrated IS-IS? A. show isis database B. traceroute C. show ip route D. show clns traffic E. show clns route Answer: E On page 245 of the Cisco Press CCNP Flash Cards, the correct command to view the L2 routing table is SHOW CLNS ROUTE. QUESTION NO: 61 One of the newly appointed TestKing trainees is curious about why subinterfaces should be configured in an OSPF NBMA topology. What can you tell her? A. Because logical interfaces are more reliable. B. To avoid split-horizon issues with the routing protocol. C. IP addressing space communication

47 D. Subinterfaces remain operational when the physical interface changes. Answer: B When configuring routers in a NBMA topology, subinterfaces are typically used. A physical interface can be split into multiple logical interfaces, called subinterfaces, with each subinterface being defined as point-tomultipoint interface. Subinterfaces originally were created to better handle issues caused by spilt horizon over NBMA and distance vector-based routing protocols. Reference: Building Scalable Cisco Networks (Ciscopress) page 120 QUESTION NO: 62 What would the reason be for redistributing/advertising IGP routes, for example OSPF and EIGRP, into BGP? A. So BGP can pass information to its OSPF neighbors. B. So BGP can pass information to its IGP neighbors. C. So BGP can pass information to its EBGP neighbors. D. So BGP can pass information to its IBGP neighbors. Answer: C When BGP is used between autonomous systems (AS), the protocol is referred to as External BGP (EBGP). Note: Customer networks usually employ an Interior Gateway Protocol (IGP) such as RIP or OSPF for the exchange of routing information within their networks Reference: Border Gateway Protocol QUESTION NO: 63 There are various types of IS-IS routers. Which of the following provide intra-area routing services? (Choose all that apply.) A. L1 IS B. L2 IS

48 C. L2 ES D. L1 ES E. L1/L2 IS F. None of the above Answer: A, E L1 IS and L1/L2 IS routers provide intra-area routing services. Reference: RFC2966 QUESTION NO: 64 You are the network administrator at TestKing. You configure a 256kbps HDLC interface as follows: interface serial 0/0 bandwidth 56 ip bandwidth-percent eigrp How much bandwidth is allocated for use by EIGRP traffic? A. 56 kbps B. 84 kbps C. 150 kbps D. 256 kbps E. 384 kbps Answer: B The ip bandwidth-percent eigrp command is used to configure the percentage of bandwidth that may be used by Enhanced IGRP (EIGRP) on an interface. In this scenario 150% of 56 kbps is chosen. This is 84 kbps. Note: Syntax ip bandwidth-percent eigrp as-number percent The percent can be higher than 100%. Reference: Cisco, Enhanced IGRP Commands

49 QUESTION NO: 65 You are the network administrator at TestKing.com. You reserved the subnet mask of /26 for use by some small branch offices. Now you also want to ensure six usable host addresses in each branch subnet by using VLSM to further subnet this block of addresses. Which VLSM mask should you use to achieve this goal? A. /24 B. /28 C. /29 D. /30 E. /31 Answer: C 3 bits (32-29) for the host would provide for 2^3-2=6 hosts as is required. QUESTION NO: 66 Your newly appointed TestKing trainee is curious about Cisco IS-IS NSAP address System IDs. What three things can you tell him? (Select three options.) A. The System ID must be the MAC address of the router. B. The System ID has to be unique within a Level-1 area. C. The System ID will identifies a node in an IS-IS network. D. The System ID has to be unique within a Level-2 area. E. The System IDs may have variable sizes within a domain. Answer: B, C, D B: All Level 1 routers and hosts in an area must have an NSAP with the same area address. C: Each system ID within an area must be unique. It is used to identify a IS-IS node. D: Level 2 routers advertise their own area addresses (NSAP) to the other Level 2 routers in the backbone. Reference: Introduction to Intermediate System-to-Intermediate System Protocol Incorrect Answers

50 A: There are several techniques for creating unique system IDs * Start numbering 1, 2, 3, 4, and so on. * Use Media Access Control (MAC) addresses. * Convert and use the loopback IP address: > > E: All ISs and ESs in a routing domain must have system IDs of the same length. Furthermore, Cisco implements a fixed length of 6 bytes for the system ID. QUESTION NO: 67 Your newly appointed TestKing trainee knows that OSPF supports VLSM. But what he does not know is how OSPF accomplishes this function. What would your tell her? A. It makes use of route summarization. B. It will allocate addresses in groups to support multiple areas. C. It carries subnet mask information in the route updates. D. It maintains a topological database. Answer: C Each route update includes subnet mask information. Incorrect Answers A: VLSM allows route summarization, but VLSM does not use route summarization. B: This is not the way VLSM work. D: A topological database does not contain VLSM information. QUESTION NO: 68 What is the reason for configuring subinterfaces in an OSPF NBMA topology? A. because the subinterfaces remains operational even when the physical interface are in a down state B. to avoid split-horizon issued with the routing protocol C. to conserve IP addressing space D. because logical interfaces better than physical interfaces Answer: B

51 A subinterface is a logical way of defining an interface. The same physical interface can be split into multiple logical interfaces, with each subinterface being defined as point-to-point. This was originally created in order to better handle issues caused by split horizon over NBMA and vector based routing protocols. Reference: OSPF Design Guide QUESTION NO: 69 Your newly appointed TestKing trainee wants to know what the purpose of Partial Sequence Number Packets (PSNPs) are on a point-to-point network connection. What would your reply be? A. To acknowledge LSPs B. To replace IIH packets C. To send link-state changes D. To establish adjacencies Answer: A There are four types of IS-IS packets: IS-IS Hello Packets, Link State Packets (LSPs), Complete Sequence Number Packets (CSNPs), and Partial Sequence Number Packets (PSNPs). PSNPs function as ACKs. Loss of a PSNP may result in an unnecessary retransmission of an LSP, but does not prevent correct operation of the routing protocol. Reference: RFC The PPP OSI Network Layer Control Protocol (OSINLCP) QUESTION NO: 70 Below is an illustration of Router TK: router bgp network neighbor remote-as In what type of relationship do Router TK and its neighbor operate? A. a peer router running IBGP B. a peer router running EBGP C. a router to neighbor running EBGP

52 D. a community member running IBGP E. a peer group member running IBGP Answer: A Both the local and remote router has the same AS number so they are peer routers running IBGP. QUESTION NO: 71 You are the network administrator at TestKing. You assistant performs the following configuration on a router: router igrp 100 network network network redistribute rip default-metric distance access-list 9 permit access-list 9 permit access-list 9 permit What conclusion can you draw about this configuration? (Select two options.) A. An administrative distance of 140 will be assigned to the IGRP learned routes to networks , , and B. Changing the administrative distance to a number larger than the default value makes networks , , and unreachable. C. The only networks allowed into the routing table will be networks , , and D. The RIP learned routes to networks , , and will be assigned an administrative distance of 140. Answer: C, D The AD is applied. The networks listed will be entered into the routing table. Note: The networks listed in under the IGRP section are advertised to other routers on the network and installed into the routing table. The routes that are redistributed from RIP from those same networks are assigned an administrative distance of 140 because of the distance command listed above. The distance command is used to

53 define an administrative distance for routes learned from other routing protocols. The last argument (9) specifies that access-list 9 be used to permit/deny networks. QUESTION NO: 72 You are the network administrator at TestKing. You are troubleshooting a router on the TestKing network. You issue the show ip route command. The output from the command is shown in the following exhibit: TK#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default <Some output deleted> Gateway of last resort is to network /8 is variably subnetted, 9 subnets, 2 masks O IA /16 [110/74] via , 00:09:13, Ethernet0 C /24 is directly connected, Serial0 O IA /16 [110/148] via , 00:05:22, Ethernet0 C /24 is directly connected, Serial1 Which two statements regarding the routing table is valid? (Select two options.) A. The area is a stub area. B. The routing table is typical of an ABR C. Network 30 is using VLSM D. The area is totally stubby. Answer: A, C A: This is a stub area. C: The exhibits states that the /8 subnet is variable subnetted, in other words it is subnetted with VLSM (Variable length subnet mask). Reference: How Does OSPF Generate Default Routes? What Are OSPF Areas and Virtual Links?

54 Incorrect Answers B: This is not an ABR (Area border router) since there are no external routes, only internal and directly connected. D: The area is stub, not totally stubby. QUESTION NO: 73 You are a PC technician at TestKing. You want configure a router for redistribution to advertise EIGRP routes into OSPF on a boundary router. You issue the following configuration commands: router ospf 1 redistribute eigrp 1 metric 25 subnets What is the purpose of the 25 parameter in the redistributive command? A. It specifies the seed to be applied to the redistributed routes. B. It specifies redistributed routes administrative distance. C. It specifies a new process-id to inject the EIGRP routes into OSPF. D. It specifies each OSPF route advertisement s metric limit. Answer: A The metric {value} command specifies the seed metric for use in redistributed routes. Reference: Building Scalable Cisco Networks (Ciscopress) page 456 QUESTION NO: 74 Your newly appointed TestKing trainee wants to know what the effect of the deny any rule is since every route map ends with an implicit deny any rule. What would your reply be? A. Packets that reach the end of the route map are discarded. B. Packets that get to the end of the route map are returned in the originating interface. C. Packets are only forwarded to the null interface

55 D. Packets that get to the end of the route map are routed normally. Answer: D : When a packet is received on an interface with policy-based routing enabled, it goes through this procedure: 1. If there is a match and the action is to permit the router, then the packet is policy-routed in accordance with the set command 2. If there is a match and the action is to deny the packet, then the packet s not policy-routed but is passed back to the forwarding engine for dynamic routing 3. If there is no match and there is no configuration for what to do in this event, the default is to deny the packet, which would return it to the routing process for normal routing 4. To block packets that find no match, you need to prevent them from being returned to normal forwarding. Normal routing is prevented by specifying a set statement to route the packets to interface null 0 as the last entry in the route map. This will route the packets to nowhere, effectively dropping them. Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.676 Topic: The Operation of Route Maps and Policy-Based Routing QUESTION NO: 75 You are a technician at TestKing. EIGRP route summarization was configured on a router s Serial0 interface summarizing routes that was learned from Ethernet0 interface. Now, your newly appointed TestKing trainee wants to know which of the following would then appear in the routing table. What would your reply be? A. a summary route pointing to the Serial0 interface. B. a summary route pointing to the Loopback0 interface. C. a summary route pointing to the Ethernet0 interface. D. a summary route pointing to the Null0 interface making it a default route. Answer: D On the router doing the summarization, a route is built to null0 for the summarized address. two# show ip route Routing entry for /8, 4 known subnets Attached (2 connections) Variably subnetted with 2 masks Redistributing via eigrp 2000 C D D C /24 is directly connected, Serial /24 [90/ ] via , 00:23:24, Serial /8 is a summary, 00:23:20, Null /24 is directly connected, Serial1-55 -

56 The route to /8 is marked as a summary through Null0. The topology table entry for this summary route looks like the following: two# show ip eigrp topology IP-EIGRP topology entry for /8 State is Passive, Query origin flag is 1, 1 Successor(s), FD is Routing Descriptor Blocks: (Null0), from , Send flag is 0x0 (note: the here means this route is originated by this router) Composite metric is ( /0), Route is Internal Vector metric: Minimum bandwidth is 256 Kbit Total delay is microseconds Reliability is 255/255 Load is 1/255 Minimum MTU is 1500 Hop count is 0 QUESTION NO: 76 You are the network administrator at TestKing. You configure a Cisco router as shown in the following exhibit: interface serial 0 ip address encapsulation frame-relay ip ospf network non-broadcast! router ospf 1 network neighbor neighbor Which of the following statements would be valid regarding the configuration. (Choose all that apply.) A. It is a point-to-point configuration over Frame Relay. B. There are no DR or BDR in this configuration. C. The DR and BDR will need a static list of neighbors due to the non-broadcast network mode. D. The network mode is nonbroadcast multiaccess (NBMA). Answer: C, D

57 The configuration printout shows ip ospf network non-broadcast. With this setup you are required to specify neighbors so that a DR & BDR can be elected. QUESTION NO: 77 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit: All the TestKing routers are configured with EIGRP. If routing from TestKing2 and TestKing3 fail to take place, which action will TestKing1 take with regard to the TestKing main Office network? A. TestKing1 will automatically route packets via TestKing4 to the TestKing Main Office Network. B. TestKing1 will place the route via TestKing4 on hold. C. TestKing1 will go into the active state for the route to TestKing Main Office Network. D. TestKing1 will take on an active role on behalf of all routers. Answer: C If routers Testking 2 and 3 fail then Testking 1 will look in its topological table for a feasible successor but it will not find one because the cost of the route thru Testking 4 is too high relative to the other two. Therefore it will go active for the route to the main office. Answer C is correct. Source BSCI Self Study Cisco Press (2003) 2nd Edition P QUESTION NO:

58 When considering outgoing IS-IS interfaces, which metric is used by Cisco routers? A. delay B. expense C. default D. error E. bandwidth Answer: C The default metric used on Cisco IOS for IS-IS is the default (cost) metric, which is cost of 10, and not delay. Reference: Page 384 of Cisco Press BSCI manual. QUESTION NO: 79 For TestKing to migrate their network from RIP to OSPF they need to redistribute all the RIP routes into OSPF and assign them the metric of 60. The internal private address is routing. Construct the correct command sequence to achieve this goal in the boxes below. Answer:

59 QUESTION NO: 80 In EBGP, which of the following configurations will advertise the subnet to EBGP neighbours? A. Router (config-router)#subnet B. Router (config-router)#network-advertise C. Router (config-router)#network D. Router (config-router)#network mask Answer: D When configuring BGP, we specify the mask keyword also along with the network command. QUESTION NO: 81 You work as a network administrator at TestKing. A router in the TestKing network is configured for EIGRP. You want to suppress the router from sending routing updates out the Serial 0/0 interface. It is necessary for the router to form and maintain neighbor adjacencies on the interface. The router has already been configured as follows: Router(config)#access-list 20 deny any Router(config)#access-list 100 permit ip any any Router(config)#router eigrp

60 Answer: We do not want to allow the routing updates along serial 0 to go out. The distribute list command is denying the ip traffic. QUESTION NO: 82 You are the network administrator at TestKing. The router topology for the TestKing network is shown in the following exhibit:

61 You configure TestKingZ with the following commands: interface serial 0 encap frame relay Which command will complete an EIGRP hybrid multipoint configuration on TestKingZ S0? A. bandwidth 56 B. bandwidth 224 C. bandwidth 256 D. bandwidth 512 Answer: B Configuring Bandwith over a Hybrid Multipoint Network If the multipoint network has differing speed allocated to the VCs, a more complete solution is needed. There are two main approaches

62 1. To take the lowest CIR and to simply multiply this by the number of circuits. This is applied to the physical interface. The problem with this configuration is that the higher bandwidth links will be under utilized for some things. Reference: CCNP Self-Study, CCNS, P BSCI Exam, Certification Guide Clare Gough, Page 484 QUESTION NO: 83 Given the following configuration: interface serial 0 ip policy route-map demo route-map demo permit 10 match ip address 4 set interface serial2 serial3 access list 4 permit Which of the statements below about a packet arriving on serial 0 would be true? A. If the packet is destined for , it will be routed out interface serial 2 and interface serial 3 by means of load-sharing. B. If the packet is sourced from , it will be susceptible to fast-switching policy routing. C. If the packet is sourced from , it will be routed out interface serial 2, unless it is not up, in which case it will be routed out interface serial 3. D. If the packet is sourced from , the flow will be routed out interface serial 2 and interface serial 3 by means of load sharing for the duration of the flow. Answer: C The set command specifies the list of interfaces which may be used to forward the traffic. If the first interface goes down, the second interface is being used. QUESTION NO:

63 You are the network administrator at TestKing. You want to configure a Cisco router for the IS-IS protocol. You want to configure Integrated IS-IS to route IP in particular. What must you do? would you apply the command shown in the exhibit above? A. Issue the ip router isis command in line configuration mode. B. Issue the ip router isis command in router configuration mode. C. Issue the ip router isis command in global configuration mode. D. Issue the ip router isis command in interface configuration mode. E. Issue the ip router isis command in local configuration mode. Answer: D ip router isis is a command specified in the interface configuration mode. ip router isis To configure an IS-IS routing process for IP on an interface, use the ip router isis interface configuration command. To disable IS-IS for IP, use the no form of this command. ip router isis [tag] no ip router isis [tag] Reference: d9c5a.html#xtocid60144 QUESTION NO: 85 You work as a technician at TestKing. The company s network consists of a hub and spoke topology that carries 24 remote offices. The router at the head quarters in Quebec is called Router TestKing1. Point-tomultipoint Frame Relay EIGRP network is in operation between the headquarters and its remote offices. None of the CIR for each Frame Relay PVC connection is similar and there is no bandwidth command configured under any of the interfaces on router R1. What could you to do counter potential EIGRP packet pacing problems due to the different CIR each PVC connection has? A. Convert each Frame Relay PVC to point-to-multipoint connection. B. Convert each Frame Relay PVC to point-to-point connection and also manually configure the bandwidth of 64 kbps for each of these PVC connections. C. Configure the bandwidth of the major interface to Mbps manually. D. Convert each Frame Relay PVC to point-to-point connection and also manually configure the bandwidth to equal to the respective CIR for each of these PVC connections

64 Answer: D Since the CIR for each interface is different and there is no bandwidth command being used, it is necessary to convert each Frame Relay to point-to-point connection and manually configure the bandwidth to equal to the respective CIR for each of these PVC connections. QUESTION NO: 86 You work as a technician at TestKing. TestKing has a branch office that is attached to a central office. Your aim is to have the central office learn all routes in the branch office. But you do not want a situation where the branch office learns all routes from the central office. What is the most scalable option you should use on the branch office router if all routes from the central office are filtered? A. Configure the interface connected to the central office as a passive interface that blocks incoming updates. B. Configure a default route pointing to the networks behind the central office router. C. Enable route update filtering on the interface connected to the central office to block incoming updates. D. Configure static routes pointing to the networks behind the central office router. Answer: B Explanation QUESTION NO: 87 You are a technician at TestKing. You inform your newly appointed TestKing trainee that you can expect problems in a situation where a single OSPF area has too many routers. Your trainee now wants to know what these problems are. What would your reply be? (Choose all that apply.) A. Routing table recalculation too frequent. B. Excessive LSA traffic. C. Adjacencies table recalculation more frequently. D. Too many reachability errors. Answer: A, B

65 Explanation QUESTION NO: 88 Which of the following features is typical of an IS-IS backbone? A. A router in every areas. B. An unbroken string of L1 and LS IS-IS routers. C. A chain of L2 and L1/L2 IS-IS routers. D. A central area to which all other areas are attached. E. All routers in a single area. Answer: C L1 routers are internal to the area and so only L2 and L1/L2 routers form the backbone in IS-IS. QUESTION NO: 89 You are a network technician at TestKing. Your newly appointed TestKing trainee wants to know which of the following qualify to be called EIGRP reliable packets. What would your reply be? (Choose all that apply.) A. hello B. ACK C. reply D. query E. update Answer: C, D, E In EIGRP, the reliable packets are reply, query and update. QUESTION NO: 90 Which of the following statements would best describe the backbone area in an IS-IS domain?

66 A. A contiguous collection of L1 routers. B. A contiguous collection of L2 routers. C. A contiguous collection of L1/L2 routers. D. A contiguous collection of L1 and L1/L2 routers. E. A contiguous collection of L2 and L1/L2 routers. Answer: E In IS-IS the backbone is a collection of L2 and L1/L2 routers. Back bone is made up of L1/L2 and L2 routers. Only L2 are backbone type. Source: BSCI Self Study Cisco Press (2003) 2nd Edition, P182. QUESTION NO: 91 With which of the following routers can a Level-1 IS set up adjacency? (Choose all that apply.) A. Any Level-2 IS in any area. B. Any Level-2 IS in the same area. C. Any Level-1 IS in the same area. D. Any Level-1 IS in any area. E. Any Level-1/Level-2 IS in the same area. Answer: C, E Level 1 routers are inside and so, it can access only level 1 routers in the same area or the L1/L2 routers in the same area. QUESTION NO: 92 Which of the following statements are valid when considering IBGP routers? A. They have to be fully meshed. B. They have to be directly connected. C. They can be in a different AS. D. They do not have to be directly connected. Answer: D The IBGP routers need not be directly connected

67 QUESTION NO: 93 Which of the following statements are valid when considering BGP policy-based routing? A. If the next-hop router fails without having an alternative path in place, routing will route to null 0. B. If the next-hop router fails without having an alternative path in place, all traffic will be denied. C. If the next-hop router fails without having an alternative path in place, routing will default to another BGP path. D. If the next-hop router fails without having an alternative path in place, policy routing will default to dynamic routing decisions. Answer: D If no alternate path is specified and the next hop router fails, policy based routing will default to dynamic routing decisions. QUESTION NO: 94 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know why is it that having neighbour relationships in OSPF will allow scalability of the network topology. What would your reply be? (Choose all that apply.) A. The hello protocol is more efficient in sending routing updates than table exchanges used in RIPv1. B. Topological database is maintained with incremental updates, with full exchange occurring only every 30 minutes. C. Neighbor adjacencies control distribution of routing protocol updates. D. It will prevent Routing table information to flood the network when holddown timers have expired. Answer: A, C Explanation QUESTION NO:

68 Which of the following tables would you find on a router running BGP? (Choose all that apply.) A. An IP routing table. B. A BGP topology table. C. A BGP attribute table. D. A table that has BGP information received from other routers. E. A combined table that has both IP routes and BGP information to and fro. F. A table that has BGP information received sent to other routers. Answer: A, F BGP has two tables - IP routing table and Table of info sent and received from other routers, Answer should be A and F. Source BSCI Self Study Cisco Press (2003) 2nd Edition P 425. QUESTION NO: 96 Which single CIDR (Supernet) prefix can a Class B private IP address range be summarized into? A. /8 B. /12 C. /16 D. /20 Answer: B In Class B, the private address is to Four bits are required to take care of the range So, from the default subnet mask of 16, minus four that gets taken out and so, it becomes 12. QUESTION NO: 97 The CEO of TestKing.com wants to know which OSPF LSA type is used by an ASBR to announce external networks. What would your reply be? A. Type 1 LSA B. Type 2 LSA

69 C. Type 3 LSA D. Type 4 LSA E. Type 5 LSA Answer: E In OSPF, Type 5 LSA is used to announce external networks. QUESTION NO: 98 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know which subnet address is included in the route summarization: /12. What would your reply be? A B C D E Answer: B Explanation QUESTION NO: 99 Your newly appointed TestKing trainee wants to know which of the following commands would be appropriate to use if she wants to display the Level-1 routing table in Integrated IS-IS. What would your reply be? A. show isis route B. show isis neighbors C. show clns route D. show clns neighbors Answer: A Explanation

70 QUESTION NO: 100 You are a technician at TestKing. You are troubleshooting a Cisco router. You need to know at what stage the topological database will be purged of out-of-date routes. Which Cisco IOS command should you use? A. show ip ospf B. show ip ospf interface C. show ip route D. show ip ospf protocols E. show ip config Answer: A Explanation QUESTION NO: 101 You are a PC technician at TestKing. You are instructed to configure route redistribution for the TestKing network because it has redundant links between routers with various types of routing protocols. Your goal would be for traffic to take the best route (fastest path). What would be your first step? A. Define the default metric. B. Determine which protocol the core router(s) is running. C. Identify the boundary router(s). D. Determine which protocol the edge router(s) is running. Answer: A Set Metrics for Redistributed Routes The metrics of one routing protocol do not necessarily translate into the metrics of another. For example, the RIP metric is a hop count and the IP Enhanced IGRP metric is a combination of five quantities. In such situations, an artificial metric is assigned to the redistributed route. Because of this unavoidable tampering with dynamic information, carelessly exchanging routing information between different routing protocols can create routing loops, which can seriously degrade network operation

71 default-metric Description: The metrics of one routing protocol do no always translate to the metrics of another protocol. The default-metric command provides a substitute when metrics do not convert, allowing redistribution between routing protocols. On area border routers in OSPF, for a stub area, inject a default route with a specified metric value into the area. The default route matches any destination that is not explicitly reachable from within the area. QUESTION NO: 102 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know which of the following routing protocols are defined by the OSI protocol suite at the network layer. What would your reply be? (Choose all that apply.) A. Routing Information Protocol B. End System-to-End System C. Interior Gateway Protocol D. Intermediate System-to-End System E. Intermediate System-to-Intermediate System Answer: D, E Both are defined by ISO in the OSI protocol suite. QUESTION NO: 103 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know which routing protocol multicast routing updates use the Class D address What would your reply be? A. EIGRP B. IGRP C. OSPF D. RIPv2 Answer: C

72 Class D addresses are not as widely used. Class D addresses are multicast addresses; some Class D multicast addresses used by routing protocols are as follows: OSPF and Routing Information Protocol version 2 (RIPSv2) EIGRP Reference: Building Scalable Cisco Networks (Cisco Press) page 69 QUESTION NO: 104 You are the network administrator at TestKing. Your newly appointed TestKing trainee wants to know which routing protocol multicast routing updates use the Class D address What would your reply be? A. EIGRP B. IGRP C. OSPF D. RIPv2 Answer: A Class D addresses are not as widely used. Class D addresses are multicast addresses; some Class D multicast addresses used by routing protocols are as follows: OSPF and Routing Information Protocol version 2 (RIPSv2) EIGRP Reference: Building Scalable Cisco Networks (Cisco Press) page 69 QUESTION NO: 105 You are a technician at TestKing. Your newly appointed TestKing trainee wants to know how many times the OSPF Shortest Path First (SPF) algorithm has been executed. Which commands should she use? A. show ip ospf border-routers B. show ip ospf interface

73 C. show ip ospf D. show ip ospf database Answer: C The show ip ospf command shows how many times the SPF algorithm has been executed. Exemple: Router# show ip ospf Routing Process "ospf 201" with ID Supports only single TOS(TOS0) route It is an area border and autonomous system boundary router Redistributing External Routes from, igrp 200 with metric mapped to 2, includes subnets in redistribution rip with metric mapped to 2 igrp 2 with metric mapped to 100 igrp 32 with metric mapped to 1 Number of areas in this router is 3 Area Number of interfaces in this area is 1 Area has simple password authentication SPF algorithm executed 6 times Reference: Incorrect Answers: A: The show ip ospf border-routers command shows internal OSPF routing table entries to an Area Border Router (ABR) and Autonomous System Boundary Router (ASBR). B: The show ip ospf interface command shows ospf-related interface specific information. This does not include the SPF algorithm. D: The show ip ospf database command shows ospf database specific information. This does not include the SPF algorithm. QUESTION NO: 106 You are a trainee technician at TestKing. TestKing has a 1000 Mbps Ethernet based OSPF network. Your instructor wants to know what the OSPF cost for 100 Mbps Ethernet media type is. What would your reply be? A. 1 B

74 C. 15 D. 100 Answer: A In OSPF, the cost of an interface is an indication of the overhead required to send packets across that interface. The cost of an interface is inversely proportional to the bandwidth of that interface. Thus, a higher bandwidth indicates a lower cost. The formula used to calculate the cost is: 100,000,000/bandwith in bps. Thus, a 100 Mbps (100,000,000 bps) has a cost of 1 (100,000,000/100,000,000) Reference: QUESTION NO: 107 With regard to BGP, which of the following statements are true? A. BGP uses UDP port 179. B. BGP uses UDP to ensure reliability of table updates. C. You can install a prefix into the BGP table when a matching prefix exists in the IP route table by using the network command with the mask option. D. A UDP connection is required before exchanging updates. E. None of the above. Answer: C QUESTION NO: 108 You are a trainee technician at TestKing. TestKing has an OSPF network. Your instructor wants to know which of the following are OSPF areas. What would your reply be? (Choose all that apply.) A. Stub B. NSSA C. Backbone D. Not-So-Stubby E. All of the above

75 Answer: E OSPF networks use several types of areas. The following are the different types of areas: An ordinary or standard area, a stub area, a totally stubby area, an NSSA (not-so-stubby-area), and the backbone area Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P QUESTION NO: 109 You are the network administrator at TestKing. The Testking network has a connection to the Internet. The router topology for the TestKing network is shown in the following exhibit: Router RTR A is configured as follows: Hostname RTR A! interface serial 0/0 ip address description Connection to ISP A! interface 10/0 ip address description Connection to RTR B!

76 interface f0/1 ip address description Connection to RTR C router bgp 5201 neighbor remote-as 5201 neighbor remote-as 5203 Hostname RTR B! interface 10/0 ip address description Connection to RTR A! interface 10/1 ip address description Connection to RTR C! router bgp 5201 neighbor remote-as 5201 neighbor remote-as 5201 Your newly appointed TestKing trainee wants to know what Router RTR A will do when it receives an update from ISP A. What would your reply be? A. It will send the update to Router RTR B and Router RTR C. B. It will send the com C. It will send the update to Router RTR B. D. It will send the update to Router RTB C. E. It will ignore and discard the update. Answer: C QUESTION NO: 110 You are a technician at TestKing. TestKing employs EIGRP on its corporate network. Your newly appointed TestKing trainee wants to know how EIGRP advertise subnet masks for destination networks. What would your reply be?

77 A. EIGRP advertises a prefix length for each destination network. B. EIGRP advertises a fixed length subnet mask for each destination network. C. EIGRP advertises a classful subnet mask for each destination network. D. EIGRP does not advertise a subnet mask for a destination network. Answer: A QUESTION NO: 111 You are the network administrator at TestKing. TestKing has an EIGRP network. A Router on the TestKing network has a route to the /16 network. IP routing is enabled on the Router. You want EIGRP to flag the /16 network as a candidate default route. What command can you issue to accomplish this? A. ip default-network B. ip route C. ip default-route D. ip network E. ip default-gateway Answer: A QUESTION NO: 112 Your TestKing trainee is curious about classful and classless routing protocols. What should you tell her? (Choose all that apply.) A. In a classful system, a router uses a bit mask to determine the network and host portions of an address and there is no class restriction. B. In a classless system, a router determines the class of an address and then identifies the network and host octets based on that class. C. In a classful system, subnet mask information is maintained and passed along with each routing update. D. In a classless system, when a routing update is received about a different major network as configured on the receiving interface, the default subnet mask is applied. E. In a classful system, when a routing update is received about the same major network as configured on the receiving interface, the router applies the subnet mask configured on the receiving interface

78 Answer: A QUESTION NO: 113 With regard to IS-IS, which of the following statements are true? (Choose all that apply.) A. L2 routers form adjacencies with L1 and L1/L2 neighbors. B. L1 routers have no knowledge about routes outside their area. C. L1/L2 routers maintain a separate Level 1 link-state database and a Level 2 link-state database, they do not advertise L2 routes to L1 routers. D. L1 routers must forward the packets to an L1/L2 router within their area when routing packets to another area. E. L1 routers must forward the packets to the L2 router of the destination area when routing packets to another area. Answer: B, C, D QUESTION NO: 114 You are the network administrator at TestKing. The TestKing network uses multiple routing protocols in different Autonomous Systems (AS). You are currently using two-way redistribution. You want to redistribute between the systems but you want to avoid routing loop issues. What should you do to accomplish these goals? A. Configure the DR manually. B. Configure the static routes manually. C. Configure the default gateway manually. D. Configure the administrative K-factor manually. E. Configure the administrative distance manually. Answer: E

79 QUESTION NO: 115 You are the network administrator at TestKing. The TestKing network consists of a single Windows 2000 Active Directory domain testking.com. Windows 2003 is used on all servers and client computers in the network. Only Cisco routers are used throughout the company. The routers are named TestKing1, TestKing2, and TestKing3. The network is characterized by: TestKing2 and TestKing3 are configured with OSPF. TestKing3 s Loopback0 interface is in Area 2. TestKing3 s S0/1 interface and TestKing2 s S0/0 interface are both in Area 0. The TestKing network is shown in the following exhibit: You are required to configure: TestKing2 s S0/1 interface in Area 1. TestKing1 s S0/0 interface in Area 1. TestKing1 s S0/0 and TestKing2 s S0/1, and only these interfaces, should be in Area 1. Use the appropriate mask! Area 1 should not receive any external routes

80 Area 1 should not receive any inter-area routes, except the default route. Answer: Click on host 2 on testking1 enab config t router ospf 1 network area 1 area 1 stub Click on host 4 testking2 enab config t router ospf 1 network area 1 network area 0 area 1 stub no-summary Note: No need to configure TestKing3 QUESTION NO: 116 In OSI terminology, what type of system is a router classified as? A. An end system. B. A routing system. C. An intermediate system. D. An inter-domain system. E. An intra-domain system. Answer: C QUESTION NO: 117 You are the network administrator at TestKing. TestKing has a discontiguous network. Your newly appointed TestKing trainee wants to know how she can she can ensure that EIGRP recognize routes separated by a different major network numbers

81 What would your reply be? (Choose all that apply.) A. Use private addresses on LAN links. B. Use static route redistribution. C. Use the no auto-summary command. D. Use route summarization. E. Use dynamic route updates. Answer: C When route summarization is enabled, which it is by default, discontiguous network space which overlaps with other parts of the network can become unreachable depending on which part of the network you are in. Issuing the no auto-summary command allows EIGRP to pass subnet information and thus makes discontiguous networks reachable QUESTION NO: 118 You are the network administrator at TestKing. You want to inject a static route into your dynamic routing protocol. You want the route advertised. Which command should you issue? A. ip route static B. ip route C. ip route interface e1 D. ip route access-group 1 Answer: B Static route configuration To establish static routes, use the ip route command in global configuration mode. To remove static routes, use the no form of this command. ip route prefix mask {ip-address interface-type interface-number [ip-address]} [distance] [name] [permanent] [tag tag] B option states IP route It means IP route (Destination Network) (Subnet Mask) (Interface Address to which traffic should be passed) Web Reference:

82 ca75a.html#wp QUESTION NO: 119 You are the network administrator at TestKing. TestKing has a class C address of You newly appointed TestKing trainee wants to know what configuration needs to be in the ASBR to advertise this class address to the outside world if the ASBR is in the backbone area. What will your reply be? A. network area 0 B. network area 0 C. network area 0 D. summary-address E. summary-address Answer: A ASBR network Configuration To define the interfaces on which OSPF runs and to define the area ID for those interfaces, use the network area command in router configuration mode. To disable OSPF routing for interfaces defined with the address wildcard-mask pair, use the no form of this command. network address wildcard-mask area area-id no network address wildcard-mask area area-id B. wrong (subnet mask is given instead of wild card mask) C and D. wrong summary-address command is used in router configuration mode to create aggregate addresses for OSPF. The no summary-address command restores the default. Web Reference: ca5a7.html# QUESTION NO: 120 With regard to controlling routing updates with the use of route filtering, which of the following statement is true? A. Only inbound routes can be filtered. B. Only outbound routes can be filtered. C. Routes to be filtered are selected by using distribute lists

83 D. Routes to be filtered are selected using only extended access lists. E. Routes to be filtered are selected by using the distribute-group command. Answer: C The OSPF Inbound Filtering Using Route Maps with a Distribute List feature allows users to define a route map to prevent Open Shortest Path First (OSPF) routes from being added to the routing table. In the route map, the user can match on any attribute of the OSPF route. Users can define a route map to prevent OSPF routes from being added to the routing table. This filtering happens at the moment when OSPF is installing the route in the routing table. This feature has no effect on LSA flooding. In the route map, the user can match on any attribute of the OSPF route. Filtering Based on Route Tag Users can assign tags to external routes when they are redistributed to OSPF. Then the user can deny or permit those routes in the OSPF domain by identifying that tag in the route-map and distribute-list in commands. In this example, OSPF external LSAs have a tag. The value of the tag is examined before the prefix is installed in the routing table. All OSPF external prefixes that have the tag value of 777 are filtered (prevented from being installed in the routing table). The permit statement with sequence number 20 has no match conditions, and there are no other route-map statements after sequence number 20, so all other conditions are permitted. route-map tag-filter deny 10 match tag 777 route-map tag-filter permit 20! router ospf 1 router-id log-adjacency-changes network area 0 distribute-list route-map tag-filter in To filter networks received in updates, use the distribute-list in command in router configuration mode. To change or cancel the filter, use the no form of this command. distribute-list [access-list-number name] [route-map map-tag] in [type number] no distribute-list [access-list-number name] [route-map map-tag] in [type number] QUESTION NO: 121 Which of the following metrics can be used by IS-IS? (Choose four) A. default

84 B. load C. delay D. expense E. reliability F. error Answer: A, C, D, F IS-IS Metrics IS-IS uses a single required default metric with a maximum path value of The metric is arbitrary and typically is assigned by a network administrator. Any single link can have a maximum value of 64, and path links are calculated by summing link values. Maximum metric values were set at these levels to provide the granularity to support various link types while at the same time ensuring that the shortest-path algorithm used for route computation will be reasonably efficient. IS-IS also defines three optional metrics (costs): delay, expense, and error. The delay cost metric reflects the amount of delay on the link. The expense cost metric reflects the communications cost associated with using the link. The error cost metric reflects the error rate of the link. IS-IS maintains a mapping of these four metrics to the quality of service (QoS) option in the CLNP packet header. IS-IS uses these mappings to compute routes through the Internetwork. QUESTION NO: 122 Which of the following statements best describes link-state protocols? A. Link state protocols periodically multicast the Link State Advertisements at 90 second intervals. B. Link state routing protocols use Hello packets to build the link state database. C. Link state routing protocols use poison reverse and holddown timer to prevent routing loops. D. Link state routing protocols use Link State Advertisements to announce route changes. Answer: B The Hello Protocol The Hello Protocol is responsible for establishing and maintaining neighbor relationships. It also ensures that communication between neighbors is bidirectional. Hello packets are sent periodically out all router interfaces. The router sends hello packets to its neighbors and receives their hello packets. In addition to helping acquire neighbors, hello packets also act as keepalives to let routers know that other routers are still functional. Topological databases are synchronized between pairs of adjacent routers

85 QUESTION NO: 123 With regards to RIP v.1 networks, which of the following two statements are true? (Choose two) A. RIP v.1 route updates have a subnet mask field. B. RIP v.1 networks are known as classful networks. C. RIP v.1 networks are known as classless networks. D. RIP v.1 route updates do not have a subnet mask field. Answer: B, D There are two versions of RIP, namely RIPv1 and RIPv2. RIPv1 is only capable of classful routing. The routing updates do not carry subnet information, which means that a network's size is determined solely by the network class of its IP Address, and there is no way to split a network into smaller subnets, each routed along a different path. RIP cannot handle Classless routing. RIP v1 summarizes all routes it knows on classful network boundaries, so it is impossible to subnet a network properly via VLSM if you are running RIP v1, which is a Classful routing protocol. QUESTION NO: 124 Which two of the following would you associate with the access layer of the three-layer hierarchical network design model? (Choose two) A. optimized transport structure B. high port density C. boundary definition D. data encryption E. local VLANs F. route summaries Answer: B, E QUESTION NO:

86 You are the newtwork administrator at TestKing. TestKing has an OSPF network. You notice that none of the routes have been successfully redistributed within the TestKing network. You are given the following configuration parameters: router ospf 100 redistribute eigrp 100 metric 100 metric-type 1 network All other configurations are correct. You want to successfully redistribute all networks and subnets on the TestKing network. What can you do to accomplish this goal? (Choose two) A. Change the OSPF process-id number from 100 to 1 in the router ospf command. B. Configure the redistribute command under router eigrp 1 instead. C. Change the EIGRP AS number from 100 to 1 in the redistribute command. D. Add the subnets option to the redistribute command. E. Add the subnets option to the redistribute command. F. Add the network command under router ospf 100. G. Change the metric to an EIGRP compatible metric value for Bandwidth, Delay, Reliability, Load, MTU, (such as ) in the redistribute command. Answer: D, F QUESTION NO: 126 You are the network engineer at TestKing. The TestKing network topology is shown in the following graphic:

87 OSFP area 1 has been configured to receive only the intra-area routes and a default route from the area 1 ABR. During routine maintenance, you issue the show ip route command on area 1 internal routers and notice that O and O IA routes appear, but no O E2 routes appear. What is the probable cause of this problem? A. At the ABR for area 1, the area 1 stub command is missing the no-summary option. B. All the routers in area 1 are missing the area 1 stub no summary option. C. At the internal routers in area 1, the area 1 stub command is missing. D. At the ABR for area 1, the area 1 stub command is missing. E. The virtual link that transits area 1 is configured incorrectly. F. Area 1 should be configured as a not-so-stubby-area with the area 1 nssa command. Answer: A An autonomous system boundary router (ASBR) advertises external destinations throughout the OSPF autonomous system. In many cases, external link states make up a large percentage of the link states in the databases of every router. A stub area is an area in which you don't allow advertisements of external routes, thus

88 reducing the size of the database even more. Instead, a default summary route ( ) is inserted into the stub area in order to reach these external routes. If you have no external routes in your network, then you have no need to define stub areas. Designates an area as a stub area. Syntax: [no] area area-id stub [no-summary] area-id An identifier for the area to define as a stub. The identifier can be either a decimal number or the dotted decimal Internet address of the area. nosummary Prevents the Area Border Router from advertising summary LSAs into the stub area. Description: Stub areas do not import or originate external LSAs. QUESTION NO:

89 With regard to the graphic, what type of router is RTD in OSPF terminology? A. designated router B. internal router C. backbone router D. area border router E. autonomous system boundary router Answer: B An area is a set of networks and hosts within an AS that have been administratively grouped together. We recommend that you configure an area as a collection of contiguous IP subnetted networks. Routers that are

90 wholly within an area are called internal routers. All interfaces on internal routers are directly connected to networks within the area. Routers that belong to more than one area are called area border routers. Routers that exchange routing information with routers in other ASs are called AS boundary routers. RTD has all the interfaces in the same area i.e. area 1 so its an internal router. QUESTION NO: 128 You are the network engineer at TestKing. The TestKing network is shown in the following graphic: No IGP is running in AS Which router(s) in AS65500 will advertise a route to if synchronization not ON? TestKing2 only TestKing5 only TestKing2 and TestKing5 only TestKing2, TestKing3 and TestKing4 only TestKing2, TestKing3, TestKing4, and TestKing5 Answer: E We need to run IGP on AS to control the exit points from the AS. All routers in AS will advertise the route. Reference: Using the Border Gateway Protocol for Interdomain Routing

91 QUESTION NO: 129 You are the network engineer at TestKing. The TestKing network is shown in the following graphic: No IGP is running in AS Which router(s) in AS65500 will advertise a route to if synchronization is not ON? A. TestKing5 only B. TestKing6 only C. Testking5 and Testking6 only D. All routers, except TestKing3 and TestKing4 E. All routers, except TestKing1 F. All routers. Answer: F BGP synchronization is a mandatory implementation and must be turn on by default according to the RFC to avoid any unreachable routes being advertised to its peers. BGP synchronization can be safely turn off if your Autonomous System is not the transit AS for other AS or in most of the internal BGP peering where all the ibgp router has full mesh ibgp peering

92 QUESTION NO: 130 You are the network administrator at TestKing. TestKing has an OSPF internetwork. You are configuring multiple areas in the TestKing internetwork. Your newly appointed TestKing trainee wants to know what the purpose of the area range command in this configuration is. What will your reply be? A. It provides the range of areas in the OSPF internetwork. B. It provides the range of areas in which this ABR participates. C. It provides a summary of networks to be advertised outside the area. D. It provides a summary of networks outside the area and inside the AS. Answer: C Creates/deletes an area address range entry and optionally specifies whether to advertise the addresses. Syntax: [no] area area-id range address mask [do-not-advertise] Description: Address ranges are used to aggregate address ranges from within the area into one single advertisement sent into the adjacent areas, or to prevent the advertisement of networks. An OSPF area is defined as a list of address ranges. Each address range consists of an address and mask pair. Area range entries are used to aggregate network information before the advertisements are flooded into the backbone. A single summary LSA is originated for each range. Overlapping area ranges are supported. By default, a Type 3 summary LSA is generated with Link State ID equal to the range's address. If necessary, the Link State ID can also have one or more of the range's host bits set and cost equal to the largest cost of any of the component networks. When the range's status indicates DoNotAdvertise, the Type 3 summary LSA is suppressed and the component networks remain hidden from other areas. QUESTION NO: 131 You are the network administrator at TestKing. You are upgrading the TestKing network. You have the following goals: Supports classless routing Supports VLSM Does not rely on TCP/IP to exchange routing information

93 Performs auto-summarization by default Allows for manual route summarization Which routing protocol should you implement on the TestKing network? A. BGP B. EIGRP C. OSPF D. IS-IS E. IGRP F. RIPv2 Answer: B Does IP-EIGRP support summarization and variable length subnet masks? Yes it does. IP-EIGRP performs route aggregation the same way IGRP does. That is, subnets of an IP network are not advertised over another IP network. The subnet routes are summarized into a single network number aggregate. In addition, IP-EIGRP will allow aggregation on any bit boundary in an IP address and can be configured at network interface granularity. EIGRP also supports automatic summarization of network addresses at major network borders. There is an automatic redistribution mechanism used so IGRP routes are imported into EIGRP and vice versa. Since the metrics for both protocols are directly translatable, they are easily comparable as if they were routes that originated in their own AS. Reference: QUESTION NO: 132 You are the network administrator at TestKing. TestKing is assigned a network of /24. You want to create 5 subnets from the assigned address. Which subnet mask will give you 5 subnets and the most possible hosts per subnet? A. /21 B. /23 C. /26 D. /27 E. /

94 Answer: D We need 5 subnets from the given address /24. It means we will do 3 bits of subnetting which will provide us 8 subnets as 2 N = 2 3 =8 subnets where n=number of subnet bits. So, we will have a total of 24+3 = 27 network bits. QUESTION NO: 133 You are the network engineer at TestKing. The TestKing network is shown in the following graphic: Router RTX is configured with the following commands: interface serial 0 encap frame relay You want to complete an EIGRP hybrid multipoint configuration on RTX S0. Which command should you issue?

95 A. bandwidth 56 B. bandwidth 224 C. bandwidth 256 D. bandwidth 768 Answer: B If the multipoint network has different speeds allocated to the VCs, take the lowest CIR and simply multiply it by the number of circuits. This is applied to the physical interface. In the case of the question 4*56=224 bandwidth 224 Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.490 Topic: Configuring Bandwidth over a Hybrid Multipoint Network QUESTION NO: 134 With regard to BGP policy-based routing, which two of the statements are true? (Choose two) A. Policy routing is configured on the inbound interface. B. Policy routing can be used to alter the final destination of the packet. C. Policy routing can be used to alter the next hop in the path of the destination D. Policy routing does not allow traffic to be directed based on the source address. Answer: A, C Rules of Policy-Based Routing BGP can implement any of the following rules associated with the hop-by-hop paradigm. This paradigm is the capability to influence which router will be the next-hop router, potentially dictating it at every router and thus influencing the entire path of the traffic, hop by hop. The following rules associated with policy-based routing seem repetitive, but, in fact, each point raises a subtly different nuance: Traffic can be directed on either the source address or both the source and destination addresses.these are only some of the criteria that can be used. Policy-based routing affects only the next hop in the path to the destination.(option C) Policy-based routing does not affect the destination of the packet. It affects the path used to get to the destination. Policy-based routing does not allow traffic sent into another autonomous system to take a different path from the one that would have been chosen by that autonomous system. It is possible to influence only how traffic will get to a neighboring autonomous system, not how it will be routed within that autonomous system. As policy-based routing examines the source address, it is configured on the inbound interface. Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.523 Topic: Rules of Policy-Based Routing

96 QUESTION NO: 135 You are the network engineer at TestKing. The router topology for the TestKing network is shown in the following graphic: Router RTA is configured as follows: RTA(config)#router rip RTA(config-router)#network RTA(config-router)#distribute-list 44 in interface BRI0 RTA(config-router)#exit RTA(config)#access-list 44 deny RTA(config)#access-list 44 permit any What are the effects of this RIP configuration on router RTA? (Choose two) A. No routing updates will be sent from interface BRI0 on router RTA to router RTX

97 B. Router RTA will not advertise the network to router RTX. C. The route network will not be entered into the routing table on router RTA. D. User traffic from the network is denied by access-list 44. E. The routing table on router RTA will be updated with the route to router RTW. Answer: C, E Answer C is correct as the distribute list calls ACL 4 which denies network Answer E is correct because RTW networks are not being blocked. Answer D is incorrect because this ACL is being called by a distribute-list which only effects route table updates, not user traffic. QUESTION NO: 136 The newly appointed TestKing trainee wants to know what area number is assigned to an IS-IS backbone. What will your reply be? A. 0 B. 1 C. Any legal are number. D. There is no backbone area number. Answer: D OSPF requires that an area be defined as a backbone area and that each other area border that backbone area. Special configuration (a virtual link) is required for any area that does not border the backbone area. IS-IS backbone routers can reside in any area. There merely must be an unbroken chain of Level 2 or Level 1/2 routers in order for the backbone to function. The IS-IS backbone is a contiguous collection of Level-2 capable routers, each of which can be in a different area. QUESTION NO: 137 interface serial 0 ip policy route-map force ip route-cache policy route-map force permit 10 match ip address 1 set ip next-hop

98 access-list 1 permit With regard to the router configuration above, which two of the following statements correctly describe want happens when a packet is received on serial 0? (Choose two) A. If a packet is destined to , it is a candidate for fast-switch policy routing. B. If a packet was sourced from , it is a candidate for fast-switch policy routing. C. The route-map policy is incomplete because it does not account for traffic that does not match D. If a packet was sourced from , it will be sent to , regardless of the desired destination IP address. Answer: B, D ip policy route-map map-tag map-tag is the name of the route map to use for policy routing. This must match a map tag specified by a route-map command. QUESTION NO: 138 You are the network engineer at TestKing. The TestKing network is shown in the following graphic:

99 Router B advertises network to Router A using BGP. What is the default value of the next-hop attribute? A B C D. Router A does not accept the advertisement from Router B because Router A is not peering with Router C via BGP. E. Router B does not advertise network to Router A because the network is not directly connected to Router B. Answer: B

100 Step 1: Router A sends update about Step 2: Router D received update and propagates on. However, if Router D changed the source address to its own address (as is usual in routing updates) there would be confusion, because this is a multiaccess network and everyone on the network would declare themselves the next hop. To avoid this confusion, the source address of the originating update is not changed. Step 3: Router B knows Router A is the next hop to network QUESTION NO: 139 Your newly appointed TestKing trainee wants to know why Level-3 area routing is not a supported feature of integrated IS-IS on Cisco routers. What will your reply be? A. The system ID on a Cisco router is limited to 6 bytes. B. The NET on a Cisco router is restricted to a maximum of 8 bytes. C. The lack of a Domain portion of the NSAP only accommodates for 2 levels of routing hierarchy. D. Cisco routers cannot route CLNS data that use the ISO/IEC standard of NSAP addressing

101 E. Since the NSAP service identifier (N-SEL) must always be set to 00, no other service types are available. Answer: C Integrated IS-IS is a version of the OSI IS-IS routing protocol that uses a single routing algorithm to support more network layer protocols than just CLNP. Integrated IS-IS sometimes is called Dual IS-IS, named after a version designed for IP and CLNP networks. Only one IS-IS process is allowed whether you run it in integrated mode, ISO CLNS only or IP only. QUESTION NO: 140 Which of the following types of authentication does RIPv2 support? A. MD5 only B. PAP and CHAP C. clear text and PAP D. clear text and MD5 Answer: D PAP and CHAP are used by PPP on serial WAN links for authentication. RIP uses clear text and MD5. Verifying MD5 Authentication By configuring the RA and RB routers as shown above, all routing update exchanges will be authenticated before being accepted. This can be verified by observing the output obtained from the debug ip rip and show ip route commands. RB#debug ip rip RIP protocol debugging is on *Mar 3 20:48:37.046: RIP: received packet with MD5 authentication *Mar 3 20:48:37.046: RIP: received v2 update from on Serial0 *Mar 3 20:48:37.050: /8 via in 1 hops Authentication

102 Authentication can prevent communication with any RIP routers that are not intended to be part of the network, such as UNIX stations running routed. Only RIP updates with the authentication password are accepted. RFC 1723 defines simple plain-text authentication for RIPv2. MD5 Authentication In addition to plain-text passwords, the Cisco implementation provides the ability to use Message Digest 5 (MD5) authentication, which is defined in RFC Its algorithm takes as input a message of arbitrary length and produces as output a 128-bit fingerprint or message digest of the input, making it much more secure than plain-text passwords. QUESTION NO: 141 With which of the following routers can a Level-1/Level-2 IS establish an adjacency? (Choose four) A. Any Level-1 IS in any area. B. Any Level-2 IS in any area. C. Any Level-1 IS in the same area. D. Any Level-1/Level-2 IS in any area. E. Any Level-1/Level-2 IS in the same area Answer: B, C, D, E A-Incorrect because a Level-1 IS router can only form adjacency with routers within the same area. All other choices are right. Ref: QUESTION NO: 142 Which two of the following would you associate with the core layer of the three-layer hierarchical network design model? (Choose two) A. access control list B. data encryption C. optimized transport D. address aggregation E. packet switching F. boundary definition

103 Answer: C, E A hierarchical network design includes the following three layers: The backbone (core) layer that provides optimal transport between sites The distribution layer that provides policy-based connectivity The local-access layer that provides workgroup/user access to the network D and F are wrong.because its of layer 2 The distribution layer of the network is the demarcation point between the access and core layers and helps to define and differentiate the core. The purpose of this layer is to provide boundary definition and is the place at which packet manipulation can take place. In the campus environment, the distribution layer can include several functions, such as the following: Address or area aggregation Departmental or workgroup access Broadcast/multicast domain definition Virtual LAN (VLAN) routing Any media transitions that need to occur Security the distribution layer can be summarized as the layer that provides policy-based connectivity. QUESTION NO: 143 You are the network engineer at TestKing. The TestKing network has two autonomous systems from running different routing protocols. The two autonomous systems have redundant paths. What redistribution method can be used to prevent routing loops between these two autonomous systems? A. static redistribution B. passive redistribution C. two-way redistribution D. one-way redistribution Answer: D One-way redistribution will be sufficient to fulfill the redistribution requirements in a loop free physical topology

104 QUESTION NO: 144 You are the network engineer at TestKing. Your newly appointed TestKing trainee wants to know what an OSPF router on an Ethernet segment will do when it sees a link-state change. What will your reply be? A. It broadcasts the LSA on each of its interfaces. B. It multicasts the link-state change to the DR and BDR. C. It immediately floods the change to all outer routers on the same segment. D. It updates its routing table, then floods the change to all other routers on the same segment. Answer: B The steps for OSPF convergence are as follows: 1. When a router detects a link failure, the router sends an LSA to its neighbors. If the router is on a multi-access link, it sends the update to the designated router (DR) and the backup designated router (BDR), not to all neighbors. 2. The path is removed from the originating router s tables. 3. On receipt of the LSA, all routers update the topology table and flood the LSA out its interfaces. 4. The routing protocol runs the Dijkstra algorithm to rebuild the routing table. For OSPF, convergence is detection time, plus LSA flooding, plus 5 seconds before computing the topology table. This amounts to a few seconds. QUESTION NO: 145 You are the network engineer at TestKing. Your newly appointed TestKing trainee wants to know what she should consider when she wants to redistribute BGP routes into an IGP. What will your reply be? A. IGPs are limited to 250 routers. B. A full BGP routing table may contain more than 100,000 routers. C. Cisco router configuration does not allow BGP routes to be redistributed into an IGP because of possible routing loops. D. Cisco automatically redistributes routes into IGPs because BGP routes are not advertised unless they are known by the IGP. Answer: B A Wrong IGP s are not limited to 250 routes. e.g. OSPF supports unlimited hops and size of routing table is not limited to any routes

105 C Wrong, BGP routes can be redistributed D Wrong, Routes cannot be automatically redistributed. We have to do redistribution manually by commands. QUESTION NO: 146 You are the network engineer at TestKing. Your newly appointed TestKing trainee wants to know what metric is used by Cisco routers on outgoing IS-IS interfaces. What will your reply be? A. delay B. error C. default D. expense E. bandwidth Answer: C QUESTION NO: 147 You are the network engineer at TestKing. A 256 kbps HDLC interface in the TestKing network has the following configuration: interface serial 0/0 bandwidth 56 ip bandwidth-percent eigrp How much bandwidth is allocated for EIGRP traffic? A. 56 kbps

106 B. 112 kbps C. 128 kbps D. 200 kbps E. 256 kbps Answer: B ip bandwidth-percent eigrp means 200% bandwidth of 56k will be used so bandwidth = 200% * 56k = 112kbps QUESTION NO: 148 You are the network engineer at TestKing. Whne you run the show ip protocol command on Router TK1 on testking, you receive the following : TK1#show ip protocol Outgoing update filter list for all interface is Incoming update filter list for all interface is Default networks flagged in outgoing updates Default networks accepted from incoming updates EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 EIGRP maximum hopcount 100 EIGRP maximum metric variance 1 Redistributing: eigrp 101, ospf 101 (internal, external 1, external 2) Automatic network summarization is in effect Routing for Networks: Routing Information Sources: Gateway Distance Last Update :05: :05: :05:21 Distance: internal 90 external 170 Routing Protocol is ospf 101 Sending updates every 0 seconds Invalid after 0 seconds, hold down 0, flushed after 0 Outgoing update filter list for all interfaces is Incoming update filter list for all interfaces is Redistributing: eigrp 101, ospf 101 Routing for Networks:

107 /32 Routing Information Sources: Gateway Distance Last Update :00:16 Which of the following statements are true for Router TK1? (Choose three) A. Redistribution has been configured for EIGRP into OSPF. B. Redistribution has been configured for OSPF into EIGRP. C. EIGRP auto-summary has been disabled. D. The OSPF process-id and the EIGRP autonomous system number can not be identical. E. EIGRP has been configured for un-equal cost paths load balancing. F. The router (p1r1) has received routing updates from three EIGRP neighbors and from one OSPF neighbor. Answer: A, B, F A is correct because under the EIGRP config the line Redistributing: eigrp 101, ospf 101 is present. B is correct because under the OSPF config the line Redistributing: eigrp 101, ospf 101 is present. F is correct because of the three neighbor updates listed under the Gateway Distance Last Update section of the EIGRP config, E is incorrect because under the EIGRP config the EIGRP maximum metric variance is 1, which is the default, specifying equal cost load balancing. QUESTION NO: 149 You are the network engineer at TestKing. The TestKing network has five paths from Router TK1 to a given destination. The local EIGRP metric on Router TK1 for these paths are as follows: local Path 1: 1500 Path 2: 1500 Path 3: 2000 Path 4: 4000 Path 5: 4000 Variance 3 is configured on Router TK1. Which paths would be included in Router TK1 s routing table? A. path 1, 2, and

108 B. path 1, 2, and 3 C. path 1, 2, and 5 D. path 1, 2, 4 and 5 E. path 1, 2, 3, 4, and 5 Answer: E If the variance number is higher than the default 1, the EIGRP process multiples the best (lowest) cost or metric value for a path by the number stated as the variance multiplier. All paths to the same destination that have metrics within this new range are now included in load balancing. Per the question this means: 1500*3=4500. All available options are within Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.485, Topic: Load Balancing in EIGRP QUESTION NO: 150 Your newly appointed TestKing trainee wants to know what OSPF area can accept type 7 external routes but not type 5 external routes. What will your reply be? A. A not-so stubby area B. A stubby area C. A totally stubby area D. A backbone area E. An on-demand area Answer: A The NSSA external LSA Identified as Type 7, these LSAs are created by the ASBR residing in a not so stubby area (NSSA). This LSA is similar to an autonomous system external LSA, except that this LSA is contained within the NSSA area and is not propagated into other areas, but it is converted into a Type 5 LSA by the ABR. An NSSA is an area that is seen as a stub area but can receive external routes, which it will not propagate into the backbone area and thus the rest of the OSPF domain. Another LSA, Type 7, is created specifically for the NSSA. This LSA can be originated and communicated throughout the area, but it will not be propagated into other areas, including Area 0. If the information is to be propagated throughout the AS, it is translated into an LSA Type 5 at the NSSA ABR. QUESTION NO:

109 You are the network engineer at TestKing. You want to configure a route map that will modify the metric for the network in the following access list: access-list 1 permit Drag the commands in the proper order to configure the route map. You are not required to apply the route map at this time. Answer:

110 route-map word permit 10 match ip address 1 set metric 50 The route-map command is shown here: Router(config)#route-map map-tag [{permit deny} sequence-number] The match commands used in policy-based routing are summarized in Table the table. These match commands are used to determine whether the packet is to be policy-routed, as opposed to being forwarded simply by destination. If it is to be policy-routed, the packet is sent down a different path, typically one less traveled. The set Commands for Policy-Based Routing with Route Maps The set commands used in policy-based routing are summarized in Table These set commands are used after the match criteria has been satisfied. Whereas the match parameter determines whether the packet will be policy-routed, the set parameter determines how the packet is to be policy-routed. Table 18-3 The match Commands used in Policy Based Routing Command Description match ip address This states the number or name of a standard or extended access list that will be used to examine incoming packets. A standard IP access list [access-list-number name] is used to match criteria for the source address of the packet. An extended IP access list is used to specify criteria based on source and [ access-list-number name] destination, application, protocol type, TOS, and precedence. If multiple access lists are specified, matching any one will result in a match. The Set Command for Redistributing with Route Maps The following set commands are used after the match criteria have been satisfied. Whereas the match parameter determines whether the route will be redistributed, the set parameter determines how the route is to be redistributed. The set command is as follows: Router(config-route-map)#map {criteria} The set command used in redistribution are summarized in Table 18-6 Table 18-6 The set Commands Used in Redistribution Command Description set level {level-1 level 2 level- Used by IS-IS to determine the level of router to which the process 1-2 stub area backbone} should import routes. Also used by OSPF to state the type of area router to which routes should be imported. set metric (BGP, OSPF, RIP) Sets the metrics value for a routing protocol. QUESTION NO: 152 You are the network engineer at TestKing. Your newly appointed TestKing trainee wants to know what a router does to maintain route consistency when it sees a change to an existing OSPF network

111 What will your reply be A. It enters the exstart state with its neighbors. B. It floods the area with new routing information. C. It generates a routing exchange using the hello protocol. D. It waits for the holddown timers to expire, then sends the update. Answer: B The steps for OSPF convergence are as follows: 1. When a router detects a link failure, the router sends an LSA to its neighbors. If the router is on a multi-access link, it sends the update to the designated router (DR) and the backup designated router (BDR), not to all neighbors. 2. The path is removed from the originating router s tables. 3. On receipt of the LSA, all routers update the topology table and flood the LSA out its interfaces. 4. The routing protocol runs the Dijkstra algorithm to rebuild the routing table. For OSPF, convergence is detection time, plus LSA flooding, plus 5 seconds before computing the topology table. This amounts to a few seconds. QUESTION NO: 153 You are the network engineer at TestKing. You want to configure EIGRP to run across a 56 Kbps serial PPP link on the TestKing network. You also want to ensure proper convergence of EIGRP routes. What command should you issue on the serial interface? A. bandwidth 56 B. bandwidth C. ip bandwidth-percent eigrp 1 56 D. ip bandwidth-percent eigrp Answer: A The bandwidth is a logical construct whose value can have wide-reaching implications on the function of your network. It does not affect the actual speed of the link. In fact, it is practical to configure the bandwidth command only on serial lines, where the speed of the link will vary considerably. Router (config) # interface S0 Router (config-if) # bandwidth speed-of-line EIGRP limits itself to 50 percent of the value specified in the bandwidth command, or if the bandwidth command is not set, the interface defaults. If you need to limit this percentage further, the upper limit that EIGRP uses can be stated as a percentage of the bandwidth command. The ip bandwidth-percent-eigrp command interacts with the bandwidth command on the interface. You would use this command primarily because in your network, the bandwidth command does not reflect the true speed of the link. The bandwidth command

112 might have been altered to manipulate the routing metric and path selection of a routing protocol, such as IGRP or OSPF. It might be better to use other methods of controlling the routing metric and return the bandwidth to a true value. Otherwise, the ip bandwidthpercent eigrp command is available. It is possible to set a bandwidth percent that is larger than the stated bandwidth. This is with the understanding that, although the bandwidth might be stated to be 56 kbps, the link is in fact 256 kbps. The following shows the structure of the ip bandwidth-percent eigrp command: Router (config) #interface S0 Router (config-if) #ip bandwidth-percent eigrp autonomous-system-number percent QUESTION NO: 154 You are the network engineer at TestKing. TestKing has a branch office with five devices that require public IP addresses. Which of the following subnet masks will provides the most efficient allocation of addresses? A B C D Answer: B Requirement = 5 public IP addresses to connect 5 devices 3-bits of hosts means 2 3 = 8 addresses It means Network Bits will be 32 3 = 29 so we will use the subnet mask / QUESTION NO: 155 As what type of system is a router classified according to ISU terminology? A. end system B. routing system C. inter-domain system D. intermediate system E. intra-domain syste,

113 Answer: D In packet-switched networks such as the Internet, a router is a device or, in some cases, software in a computer, that determines the next network point to which a packet should be forwarded toward its destination. The router is connected to at least two networks and decides which way to send each information packet based on its current understanding of the state of the networks it is connected to. A router is located at any gateway (where one network meets another), including each point-of-presence on the Internet. A router is often included as part of a network switch. QUESTION NO: 156 You are the network engineer at TestKing. You want to display adjacencies in Integrated IS-IS. What command should you issue? A. show isis route B. show clns route C. show isis database D. show clns neighbors Answer: D The show clns neighbor and show clns interface commands both display the adjacencies. The show clns neighbor command gives information as to the state of the link, the type of routing performed on the link, the data-link address (SNPA) of the link, and the holdtime, or how long since it received the last Hello. A# show clns neighbor System Id Interface SNPA State Holdtime Type Protocol B Se0 DLCI 526 Up 29 L2 IS-IS C Se0 DLCI 527 Up 9 L2 IS-IS QUESTION NO: 157 A router on the TestKing network has the following configuration: router ospf 67 network area 1 network area 0 area 0 range area 1 range

114 Which of the following statements are true for this router? (Choose three) A. The OSPF router ID is 78. B. This is an area border router. C. The designated router priority is 76. D. This router connects area 1 to the backbone area. E. Any router interfaces with an address of x.x are in area 0. Answer: B, D, E ABR This router is responsible for connecting two or more areas. It holds a full topological database for each area to which it is connected and sends LSA updates between the areas. In this case, router is running network in area 1 and network in area 0 so, its an area border router. (Choice B is correct) In the command, Router ospf is the process Identifier so choice A and C are eliminated. QUESTION NO: 158 You are the network engineer at TestKing. Your newly appointed TestKing trainee wants to know what the difference between an OSI NSAP address and a Network Entity Title (NET)is. What will your reply be? A. A NET is an NSAP address with the N-selector byte set to 00. B. Network Entity Titles do not have to start and stop on byte boundaries. C. The System ID field of the NSAP address does not uniquely identify a node. D. To identify a Domain, and NSAP address must be used because a NET can only identify an Area. E. A NET is a special version of an NSAP address restricted to 8 bytes for the Area Address, System ID and the N-Selector byte. Answer: A NETs and NSAP NETs and NSAPs are ISO addresses. The differences between the NET and NSAP addresses are subtle. The NET address is the address of the host, where the value in the NSEL field is set to 0x00. Therefore, there is no upper-layer protocol identified within the host. With no application identified within the end host, the packet can be routed to the destination, but it cannot be handed off to a process after it has been delivered. However, routers do not have upper-layer protocols to identify because they are transitory ISs. Therefore, the NSAP of the router is referred to as a NET because the NSEL field is set to 00. The NSAP is the full ISO address. It not only defines the area and destination host within the area, but also specifies where to send the incoming packet after it has reached the

115 host. The NSEL field at the end of the ISO address specifies the upper-layer protocol and is similar to the Protocol field of the IP header. Network Entity Title (NET) In IS-IS, this is the ISO address of the system, but not to the process destination within the system. The NET describes both the area and system ID of a system in the IS-IS network but excludes the NSEL, which is set to 0x00. If the NSEL identifies the process within the system, the ISO address is called the NSAP address. Network Service Access point (NSAP) In IS-IS, this describes a service at the network layer to which the packet is to be directed. The NSAP is the NET address with the NSEL field set to a positive value, a value other than 0x00. Network entity title (NET) The NET describes both the area and system ID of a system in the IS-IS network but excludes the NSEL, which defines the NSAP address of the system. Network service access point (NSAP) Describes a service at the network layer to which the packet is to be directed. The NSAP is the NET address with the SEL field set to a value other than 0x00. QUESTION NO: 159 Given the following partial configuration for Router A: interface serial0 ip address encapsulation frame-relay ip ospf network point-to-multipoint router ospf7 network area 0 Which two statements are correct? (Choose two) A. DR/BDR elections do not take place. B. The router is restricted to a hub and spoke topology. C. The area 0 NBMA cloud is configured as more than one subnet. D. OSPF neighbor statements are not necessary

116 Answer: A, D Point-to-Multipoint Network Point-to-multipoint is a single interface that connects to multiple destinations. The underlying network treats the network as a series of point-to-point circuits. It replicates LSA packets for each circuit. OSPF traffic is sent as multicast. There is no DR or BDR election. This technology uses one IP subnet for all endpoints on the network. By default, the network is considered to be a series of point-to-point interfaces. There is no need to specify neighbors, because the neighbors will see each other and simply become adjacent, with no need for the election of a DR or a BDR. Point-to-multipoint does not try to reduce adjacencies using a DR. Instead, it accepts the extra overhead of having a full set of adjacencies for the sake of stability. Point-to-multipoint forms an adjacency automatically along any PVC, which causes more overhead but is more resilient than NBMA. QUESTION NO: 160 You are configuring redistribution to advertise EIGRP routes into OSPF on a boundary router. Given the configuration: router ospf 1 redistribute eigrp 1 metric 25 subnets Which is the function of the subnets in the redistribute command? A. It specifies subnetted routes should advertised into OSPF. B. It specifies subnetted routes should be advertised out of OSPF. C. It specified routes that will be summarized on the 25-bit boundary. D. It specifies a limit of 25 subnets for each OSPF route advertisement. Answer: A subnets (Optional) For redistributing routes into OSPF, this is the scope of redistribution for the specified protocol. It is important to remember that this is required to bring subnets of classful networks. QUESTION NO: 161 What are two solutions to overcome the full mesh requirement with ibgp? (Choose two) A. BGP groups B. BGP local preference C. Route reflector D. Confederation E. Aggregate-address

117 Answer: C, D QUESTION NO: 162 Based on the topology shown in the network diagram, what optional EIGRP configurations will be required in order to achieve full connectivity within AS 100? A. Use the EIGRP no auto-summary command on TK1 and TK2. B. Use the EIGRP no auto-summary command on TK3 and TK4. C. Use the passive interface on the TK1 and TK2 interface that connects to the /24 and /24 subnet respectively. D. Use the passive interface command between the TK3 and T1 connection and between the TK3 and TK2 connection. E. Use the variance command on TK3. Answer: B QUESTION NO: 163 Which packet type is used to acknowledge LSPs on point-to-point links and to request missing pieces of information in the IS-IS link state database?

118 A. complete SNP (CSNP) B. partial SNP (PSNP) C. hello D. database query E. database description packet (DDP) Answer: B CSNP Complete Sequence Number PDUs are used to tell other routers about all the LSPs in one router database; similar to an OSPF database descriptor packet PSNP Partial Sequence Number PDUs are used to request an LSP and acknowledge receipt of an LSP PDUs (PSNP s) every 3 seconds and complete sequence number PDUs (CSNPs) every 10 seconds that describe the full database of the DIS. Another router can ask the DIS for a missing LSP using a partial sequence number packet (PSNP), or in turn give the DIS a new LSP. QUESTION NO: 164 The network is not being propagated throughout the network. Observe the BGP configuration commands from the advertising router. What is the reason the route is not being advertised? Router bgp neighbor remote-as neighbor remote-as network network ! ip route null0 A. The network statement is missing mask B. The network statement is missing mask C. The network statement is missing mask D. The network statement is missing mask E. The auto-summary configuration is missing Answer: QUESTION NO:

119 Which command displays statistics on EIGRP hello, updates, queries, replies, and acknowledgments? A. debug eigrp packets B. show ip eigrp traffic C. show ip eigrp topology D. show ip eigrp neighbors Answer: B show ip eigrp traffic To display the number of Enhanced Interior Gateway Routing Protocol (IGRP) packets sent and received, use the show ip eigrp traffic EXEC command. show ip eigrp traffic [autonomous-system-number] Syntax Description autonomous-system-number (Optional) Autonomous system number. The following is sample output from the show ip eigrp traffic command: Router# show ip eigrp traffic IP-EIGRP Traffic Statistics for process 77 Hellos sent/received: 218/205 Updates sent/received: 7/23 Queries sent/received: 2/0 Replies sent/received: 0/2 Acks sent/received: 21/14 Table 62 show ip eigrp traffic Field Descriptions process 77 Field Description Autonomous system number specified in the ip router command. Hellos sent/received Number of hello packets that were sent and received. Updates sent/received Number of update packets that were sent and received. Queries sent/received Number of query packets that were sent and received. Replies sent/received Number of reply packets that were sent and received

120 Acks sent/received Number of acknowledgment packets that were sent and received. l#wp QUESTION NO: 166 What number is a valid representation for the 200F:0000:AB00:0000:0000:0000:0000/56 IPv6 prefix? A. 200F:0:0:AB/56 B. 200F:0:0:AB00:/56 C. 200F:AB00:56 D. 200F:AB/56 Answer: B QUESTION NO: 167 Match the OSPF area type on the left to the type of OSPF routes it will support. Answer:

121 QUESTION NO: 168 Cisco routers perform route summarization automatically for which three routing protocols? (Choose three) A. IS-IS B. IGRP C. OSPF D. EIGRP E. RIP v.1 Answer: B, D, E Properties of RIP, IGRP and EIGRP show auto summarization QUESTION NO: 169 During a recent OSPF election among three routers, TK1 was elected the DR and TK2 was elected the BDR, as seen in the graphic. Assume that TK1 fails, and that TK2 takes the place of the DR wile TK3 becomes the new BDR. What will happen when TK1 comes back online? A. TK1 will take the place of DR immediately upon establishing its adjacencies. B. TK1 will take the place of DR only if TK2 fails. C. TK1 will take the place of DR only if both TK2 and TK3 fails

122 D. A new election will take place establishing an all new DR and BDR based on configured priority levels an MAC addresses. Answer: C If a router with a higher priority value gets added to the network, it does not preempt the DR and BDR. The only time a DR and BDR changes is if one of them is out of service. If the DR is out of service, the BDR becomes the DR, and a new BDR is selected. If the BDR is out of service, a new BDR is elected. Source: CCNP Self-Study Second Edition P.243 Topic: Electing a DR QUESTION NO: 170 Which two problems can occur when a single OSPF area has too many routers? (Choose two) A. Excessive LSA traffic. B. Frequent routing table recalculation. C. Frequent adjacencies table recalculation. D. Unacceptable number of reachability errors. Answer: A, B QUESTION NO: 171 You are using multiple protocols in different Autonomous Systems (AS). You need to redistribute between the systems. You are using two-way redistribution. Which action should help you avoid routing loop issues? A. Manually configuring the static routes. B. Manually configuring the default gateway. C. Manually configuring the administrative K-factor. D. Manually configuring the administrative distance. Answer: B, D If two-way redistribution cannot be avoided, use the mechanisms in the following list: 1.Manually configure the metric 2.Manually configure the administrative distance 3.Useing distribution access lists

123 Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.627 Topic: Avoiding Suboptimal Routing Decisions When Redistributing QUESTION NO: 172 In a link-state environment, what does the router do when a route flaps? A. It enters the exstart state with its neighbors. B. It floods the area with new routing information. C. It generates a routing exchange using the hello protocol. D. It waits for the holdown timers to expire and then sends an update. Answer: B QUESTION NO: 173 Which three statements are true regarding EIGRP? (Choose three) A. By default, EIGRP performs auto-summarization across classful network boundaries. B. EIGRP uses an area hierarchy increase network scalability. C. The speed convergence, EIGRP attempts to maintain a successor and feasible successor path for each destination. D. EIGRP uses hellos to establish neighbour relationships. E. By default, EIGRP uses the Dijkstra algorithm to determine the best path to a destination network based on bandwidth and delay Answer: A, C, D QUESTION NO: 174 Which network topology is best suited for ODR? A. highly redundant B. fully meshed C. dual self-healing ring D. hub and spoke E. NBMA

124 Answer: D On Demand Routing (ODR) is a mechanism that provides minimum-overhead IP routing for stub sites. The overhead of a general dynamic routing protocol is avoided, without incurring the configuration and management overhead of using static routing. A stub router is the peripheral router in a hub and spoke network topology. Stub routers commonly have a WAN connection to the hub router and a small number of LAN network segments (stub networks) that are connected directly to the stub router. To provide full connectivity, the hub routers can be statically configured to know that a particular stub network is reachable via a specified access router. However, if there are multiple hub routers, many stub networks, or asynchronous connections between hubs and spokes, the overhead required to statically configure knowledge of the stub networks on the hub routers becomes too great. ODR simplifies installation of IP stub networks in which the hub routers dynamically maintain routes to the stub networks. This is accomplished without requiring the configuration of an IP routing protocol at the stub routers. With ODR, the stub advertises IP prefixes corresponding to the IP networks that are configured on its directly connected interfaces. Because ODR advertises IP prefixes, rather than IP network numbers, ODR is able to carry Variable Length Subnet Mask (VLSM) information. Once ODR is enabled on a hub router, the router begins installing stub network routes in the IP forwarding table. The hub router can also be configured to redistribute these routes into any configured dynamic IP routing protocols. IP does not need to be configured on the stub router. With ODR, a router is automatically considered to be a stub when no IP routing protocols have been configured on it. QUESTION NO: 175 In a link-state environment, what does the router do when a route flaps? A. It enters the exstart state with its neighbors. B. It floods the area with new routing information. C. It generates a routing exchange using the hello protocol. D. It waits for the holdown timers to expire and then sends an update. Answer: B QUESTION NO: 176 Which command should you use to verify what networks are being routed by a given OSPF process? A. show ospf B. show ip route

125 C. show ip protocol D. show ip ospf database Answer: C This command shows the configuration of IP routing protocols on the router. It details how the protocols were configured and how they interact with one another. It also indicates when the next update will occur, and what networks are being routed for a given OSPF process. Output shown below: Router# show ip protocols Routing Protocol is "ospf 100" Sending updates every 0 seconds Invalid after 0 seconds, hold down 0, flushed after 0 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: ospf 100 Routing for Networks: Routing Information Sources: Gateway Distance Last Update :02: :03: :03:04 Distance: (default is 110) Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.247 Topic: The show ip protocols command QUESTION NO:

126 TK1#show clns interface ethernet 0 Ethernet0 is up, line protocol is up Checksums enabled, MTU 1497, Encapsulation SAP Routing Protocol: ISIS Circuit Type: level-1-2 Interface number 0x0, local circuit ID 0x1 Level-1 Metric: 10, Priority: 64, Circuit ID: TK2.02 Number of active level-1 adjacencies: 1 Level-2 Metric: 10, Priority: 64, Circuit ID: TK2.01 Number of active level-2 adjacencies: 1 Next ISIS LAN Level-1 Hello in 5 seconds Next ISIS LAN Level-2 Hello in 1 seconds Refer to the output shown above. Which statement is correct about IS-IS? A. Router TK1 is the DIS for both L1 and L1 B. Router TK1 is the backup DIS for both L1 and L2. C. Router TK2 is the DIS for both L1 and L2. D. Router TK1 is the DIS for L1 and a different router (TK2) is the DIS for L2. E. Router TK1 is the DIS for L2 and a different router (TK2) is the DIS for L1. Answer: C

127 It is the DIS that generates the pseudonode Link State Packet (LSP) and is denoted with a non-zero LSP-ID - R2.01 QUESTION NO: 178 An ISP is running a large IBPG network with 25 routers. The full mesh topology that is currently in place is inefficient on bandwidth and BGP traffic. What can the administrator configure to reduce the number of BGP neighbour relationships within the AS? A. route reflectors B. route maps C. route redistribution D. peer groups E. aggregate addresses Answer: A, D Question: How can a fully meshed network be avoided in ibgp? Answer: A fully meshed network can cause some problems to the routers because they have a great deal of information to handle from every directly connected router. The configuration of route reflectors does not use as much bandwidth, CPU, or memory. Router reflectors allow the router to pass routes on to its peers, and a hub-and-spoke topology is thus possible Source: Self-Study CCNP BSCI Exam Certification Guide Third Edition P.831 Topic: Question 9 QUESTION NO: 179 Drag each characteristic to the appropriate routing protocol type

128 Answer: QUESTION NO:

129 In reference to the network topology diagram shown in the exhibit, which statement is true? A. The network is using a two-layer full-mesh hierarchical design. B. The network is using a two-layer hub-and-spoke hierarchical design. C. To improve scalability, route summarization at Routers TK1, TK2, TK3, TK4, TK5, TK6 must be performed. D. Routers A and B are the distribution layer routers. E. Routers TK1, TK2, TK3, TK4, TK5 and TK6 are the access layer routers. Answer: C Routers TK1, TK2, TK3, TK4, TK5 and TK6 are the distribution layer routers. Route summarization should occur at the distribution layer. QUESTION NO: 181 Which routing protocol (1) is intended to support large routing domains consisting of combinations of many media types, (2) may be used as an IGP, and (3) supports multiple routed protocols in an integrated rather than Ships in the Night method? A. EIGRP

130 B. OSPF C. IS-IS D. ibgp Answer: A QUESTION NO: 182 Which type of OSPF network requires manual configuration of OSPF neighbors? A. broadcast multi-access B. nonbroadcast multi-access C. point-to-point D. point-to-multipoint Answer: B QUESTION NO: 183 What are three reasons to control routing updates via route filtering? (Choose three) A. To hide certain networks from the rest of the organization. B. For easier implementation. C. To control network overhead on the wire. D. For simple security. E. To prevent adjacencies from forming. Answer: C, D, E The BGP Prefix-Based Outbound Route Filtering feature uses Border Gateway Protocol (BGP) outbound route filter (ORF) send and receive capabilities to minimize the number of BGP updates that are sent between BGP peers. Configuring this feature can help reduce the amount of system resources required for generating and processing routing updates by filtering out unwanted routing updates at the source. For example, this feature can be used to reduce the amount of processing required on a router that is not accepting full routes from a service provider network. The BGP Prefix-Based Outbound Route Filtering feature can limit the number of unwanted routing updates, which will reduce the amount of resources required for routing update generation and processing. This feature also reduces the amount of resources required to receive and discard routes that would otherwise be filtered out

131 QUESTION NO: 184 Which two features are characteristics of link-state routing protocols? (Choose two) A. Link-state protocols are based on the Dijkstra algorithm. B. Any incremental updates contain the full routing table. C. Link-state protocols flood the area with LSAs when a network change occurs. D. Routing updates are broadcast to neighbors. E. Link-state protocols use split-horizon updates to avoid routing loops. Answer: A, C QUESTION NO: 185 Which three characteristics apply to IS-IS but not to OSPF? (Choose three) A. Encapsulates PDUs directly into a data-link frame. B. Uses a DIS and a backup DIS to present the pseudo-node on the LAN. C. Uses stubby areas to improve network scalability. D. Uses a default IOS metric of 10 on each interface. E. Runs PRC (Partial Calculations) to calculate IP reachability information. F. Uses an on-demand circuit to reduce the hello and LSA flooding across switched WAN links, such as ISDN. Answer: QUESTION NO: 186 Why is Level-3 area routing an unsupported feature of integrated IS-IS on Cisco routers? A. The System ID on a Cisco router is limited to 6 bytes. B. The NET on a Cisco router is restricted to a maximum of 8 bytes. C. The lack of a Domain portion of the NSAP only accommodates for 2 levels of routing hierarchy. D. Cisco routers cannot route CLNS data that use the ISO/IEC standard of NSAP addressing. E. Since the NSAP service identifier (N-SEL) must always be to set 00, no other service types are available. Answer:

132 QUESTION NO: 187 Why should ibgp sessions be fully meshed within a Transit AS? A. BGP requires redundant TCP sessions between ibgp peers. B. A full mesh allows for optimal routing within the Transit AS. C. Routes learned via ibgp are never propagated to other ebgp peers. D. Routes learned via ibgp are never propagated to other ibgp peers. E. Routes learned via ebgp are never propagated to other ibgp peers. Answer: E QUESTION NO: 188 PC1 is unable to ping PC2 successfully

133 Given the above diagram and configurations, which solution would fix this problem? A. Enable ip classless on TK1 and TK2. B. To support discontinuous subnet, enable RIPv2 on TK1 and TK2 then enable auto-summary. C. Enable both RIPv1 and RIPv2 on TK1 and TK2. D. Enable no auto-summary in RIP router configuration mode on TK1 and TK2. Answer: B QUESTION NO: 189 Based on the P1R2 show ip bgp output, which statement is true? A. The best path to reach the prefix is via B. The best path to reach the prefix is via C. The best path to reach the prefix is via both and ; BGP will automatically load balance between the two. D. The and prefixes were learned via EBGP from the and EBGP neighbors. Answer: B QUESTION NO:

134 TK1# showrun interface Loopback0 ip address ! interface Ethernet0 ip address media-type 10BaseT!! router eigrp 100 redistribute connected network auto-summary no eigrp log-neighgbor-changes! ip classless no ip http server TK2# showrun interface Ethernet0 ip address media-type 10BaseT! interface Ethernet1 ip address media-type 10BaseT! router eigrp 100 network network ! ip classless no ip http server TK3# showrun interface Ethernet1/0 ip address ! router eigrp 100 network auto-summary no eigrp log-neighbor-changes!

135 ip classless ip http server With the topology found in the graphic, what will the TK1 loopback 0 be in the TK3 routing table? A. It will show up in the routing table as D /8. B. It will show up in the routing table as D EX /8. C. It will show up in the routing table as D /24. D. It will show up in TK3 routing table because there is no network command on TK1. Answer: E QUESTION NO: 191 Which three statements are true regarding EIGRP? (Choose three) A. By default, EIGRP performs auto-summarization across classful network boundaries. B. EIGRO uses an area hierarchy to increase network scalability. C. To speed convergence, EIGRP attempts to maintain a successor and feasible successor path for each destination. D. EIGRP uses hellos to establish neighbour relationship. E. By default, EIGRP uses the Dijkstra algorithm to determine the best path to a destination network based on bandwidth and delay. Answer: A, C, D QUESTION NO: 192 Which four characteristics are common to IS-IS and OSPF? (Choose four) A. Link-state database B. Backbone area design C. Shortest Path First (SPF) algorithm D. Update, Decision, and Flooding Process E. Hello protocol to establish and maintain adjacencies Answer: A, C, D, E

136 B is incorrect because there is no backbone in IS-IS like OSPF. IS-IS backbone is a contiguous collection of Level-2 capable routers each of which can be in a different area. QUESTION NO: 193 On a Cisco multilayer switch, which command will configure a port to act as routed interface? A. ip routing B. switchport mode trunk C. no switchport D. switchport trunk native vlan 1 Answer: C To turn a switch-port into a router interface, it is simply a matter of turning off the switch-port functionality. Switch(config)#interface fa 0/1 Switch(config-if)#no switchport QUESTION NO: 194 Given the above diagram, which statement correctly matches the letter to the type of IS-IS hello PDU?

137 A. A=ISH; B=IIH; C:ESH B. A=IIH; B=ESH; C=ISH C. A=ISH; B=ESH; C:IIH D. A=ESH; B=ISH; C=IIH E. A=IIH; B=ISH; C=ESH Answer: D QUESTION NO: 195 What is the most valid reason to carry voice traffic on a separate VLAN in a switched network providing both data and IP telephony services? A. IP phones require inline power and must be in separate VLAN to receive inline power. B. IP telephony applications require prioritization over other traffic as they are more delay sensitive. C. IP phones can only receive IP addresses through DHCP if they are in separate VLAN. D. The CDP frames from the IP phone can only be recognized by the switch if the phone is in an auxiliary vlan. Answer: B QUESTION NO: 196 What are three disadvantages of a router-on-stick configuration for InterVLAN routing? (Choose three) A. InterVLAN routing cannot be filtered by the router. B. The router becomes a single point of failure for the network. C. Routers will not route STP BPDUs. D. There is a possibility of inadequate bandwidth for each VLAN. E. Additional overhead on the router can occur. F. NetFlow Switching is required for InterVLAN accounting. Answer: B, D, E QUESTION NO:

138 Which three QoS mechanisms can be configured to improve VoIP quality on a converged network? (Choose three) A. The use of a queuing method that will give VoIP traffic strict priority over other traffic. B. The use of RTP header compression for the VoIP traffic. C. The proper classification and marking of the traffic as close to the source as possible. D. The use of 802.1QinQ trunking for VoIP traffic. E. The use of WRED for the VoIP traffic. Answer: A, C, E QUESTION NO: 198 If a router has a route to the /16 network, which command will cause EIGRP to flag the /16 network as a candidate default route? A. ip default-network B. ip route C. ip default-network D. default-information originate E. ip classless Answer: A QUESTION NO: 200 What protocol specified by RFC 1256 will allow an enabled IP host to find a new router when a router becomes unavailable? A. IRDP B. SNMP C. HSRP D. VRRP Answer: A

139 QUESTION NO: 201 Given the switch configurations, which of the following statements is correct? A. PAgP is correctly configured and the EtherChannel will form. B. LACP is correctly configured and the EtherChannel will form. C. One switch must be in LACP Active mode for the EtherChannel to form. D. Only one switch must be in the On mode and the other in the LACP Passive mode for Etherchannel to form. E. Each physical port in the EtherChannel must have the command switchport access vlan 10 for the EtherChannel to form. Answer: C To start automatic EtherChannel configuration with LACP, configure at least one end of the link to active mode to initiate channeling, because ports in passive mode passively respond to initiation and never initiate the sending of LACP packets. QUESTION NO: 202 What are some of the advantages if implementing end-to-end VLANs? (Choose two) A. End-to-end VLANs are easy to manage. B. Users are grouped into VLANs independent of a physical location. C. Each VLAN has a common set of security and resource requirements for all members. D. Resources are restricted to a single location

140 Answer: B, C Users are grouped into VLANs independent of physical location and dependent on group or job function. Each VLAN has a common set of security requirements for all members. QUESTION NO: 203 What are two Cisco IOS commands that can be used to view neighbor adjacencies? (Choose two) A. show ip ospf database B. show ip ospf neighbors C. show ip ospf protocols D. show ip ospf interfaces Answer: B, D QUESTION NO: 204 Given the configuration on SwitchTK1 and SwitchTK2, which two statements are true? (Choose two) A. The trunk is currently using the ISL trunking protocol. B. The trunk is currently using the 802.1q trunking protocol. C. By default, all VLANs will be transmitted across this trunk. D. By default, SwitchTK1 and SwitchTK2 s Fast Ethernet 0/1 port will not generate DTP messages. Answer: B, C QUESTION NO: 205 How is network layer addressing accomplished in the OSI protocol suite? A. Internet Protocol address